1960 702 ci V12 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ClassicAutoResto · 07-29-2007, 12:22 AM

How about one of these for your truck? Yes they were made for 60-66 chevy (large) trucks. This one would flip my cherry picker real quick.

http://www.6066gmcguy.org/Jolly-702v12.htm

or this one;

http://www.6066gmcguy.org/TwinSix.htm

jerry

p.s. give anyone ideas for a mid engine 60-66 suburban?

60ratrod · 07-29-2007, 07:29 AM

makes homer simpson drooly noise........ me likey!!! would deffinatly be a sight to see at a carshow in one of our style trucks

hewlett2002000 · 07-29-2007, 10:00 AM

omg i would love to get my hands on one of those for my truck. that would be bad ass. im going to eaither go with a caddy 500 or a ls1. im undecided but leaning tword the ls1.

krue · 07-29-2007, 10:12 AM

Good reading there.

ClassicAutoResto · 07-29-2007, 10:33 AM

With that engine, I wonder if you would need to go with the front springs for an A/C truck? LOL
Jerry

mbgmike · 07-29-2007, 10:43 AM

Yeah
I remember laying in bed at night as a kid and hearing the Old Wilson Freight down the road leaving the Terminal Late at night. They Had a Fleet of those trucks with those motors. They have there own unique sound. I kind of miss hearing them. I would love to have one.

mbgmike · 07-29-2007, 10:45 AM

Quote:

Originally Posted by ClassicAutoResto

How about one of these for your truck? Yes they were made for 60-66 chevy (large) trucks. This one would flip my cherry picker real quick.

http://www.6066gmcguy.org/Jolly-702v12.htm

or this one;

http://www.6066gmcguy.org/TwinSix.htm

jerry

p.s. give anyone ideas for a mid engine 60-66 suburban?

They used them in stationary compressors also. Like in pipeline/oil field.

ClassicAutoResto · 07-29-2007, 10:46 AM

I would love to hear one run. Here is another forum discussion I found on this engine.

The 702 V12 was a gas engine,never was a diesel version of it. Notice JD's picture has two natural gas/propane carbs. The sparkplugs are on top of the heads between the valve covers and intake manifold. In later years,the 702 V12 was replaced by the 637 V8.

Jon Hagen
12-19-2006 17:38:10
69.26.30.29
519260

Re: speaking of 2 stroke diesels in reply to Jon Hagen, 12-19-2006 17:20:21

Whups,I read JD's post again. The 702 V12 Was a factory built truck engine, built with a lot of V6 parts. The block,crankshaft and camshaft were one piece V12 units,exclusive to the V12, with 4 V6 351 heads and exhaust manifolds. It used 2 V6 351 intake manifold and carb assys. It had an odd distributor at the rear of the block with the dual points under a metal cover and two 6 cyl distributor heads,rotors,caps to fire all twelve cylinders. The 637 V8 was more powerfull and much more durable.
The downfall of the 702 V12 was that looong spindly crankshaft. Most died from a broken crankshaft in truck use.
Detroit Diesel,atleast in the 149 series,and I think smaller series,assembled V12 and V16 engines by bolting 2 V6 or V8 blocks together. They a special long alignment shaft to fit the main bores of both blocks to keep the mains in alignment while bolting the blocks together.

mbgmike · 07-29-2007, 11:14 AM

Here is one of those bad boys. This is how dirty they usually looked too

Some of theirs were factory and some of theirs were stretched and added on. the hoods were too short and they scabbed a section on kind of hap hazard. Most had two little wimpy exhaust pipes up the back .The picture is really of the 8V-71NE Powered truck. I wish I had a 12 v pic. They had the scabbed hood that looked even stranger. Looked like they had done it themselves.

Tomsriv · 08-22-2007, 09:48 PM

Quote:

Originally Posted by mbgmike

Yeah
I remember laying in bed at night as a kid and hearing the Old Wilson Freight down the road leaving the Terminal Late at night. They Had a Fleet of those trucks with those motors. They have there own unique sound. I kind of miss hearing them. I would love to have one.

Ask and you shall receive. I did a youtube search on "702 GMC" http://www.youtube.com/results?searc...&search=Search

**slepysal** · 08-22-2007, 11:35 PM

wow and only wow!!!

ClassicAutoResto · 08-24-2007, 11:08 PM

Thanks for the link Tomsriv.....anyone have one to install?

68GMCCustom · 08-25-2007, 01:09 AM

did y'all get a look at this project?

check it out here: www.blastolene.com/B702.html

Stepside65 · 08-25-2007, 02:09 AM

Hadn't seen it but is definitely very cool.

Dingfodgy · 08-25-2007, 02:38 AM

I'll agree that the GMC factory beast is an impressive piece of nostalgia, but if you wanna s@*t purple twinkies....check this out!

http://www.falconerengines.com/prod04.htm

There's an audio clip of this thing that is just effin' ear-candy. It sounds like a swarm of pissed off bees- straight out of hell itself!

ClassicAutoResto · 08-25-2007, 11:25 PM

WELL F.M.R. ........That's bad!

Woogeroo · 08-26-2007, 12:37 AM

http://www.6066gmcguy.org

Jolly is good people... that is THE place to go if you have a 60-66 GMC truck.

-W

hewlett2002000 · 08-26-2007, 12:44 AM

well i have to be honest, if i knew where to find one i would shoehorn it into my truck just to be different!!!! and im serious. the only second thought i would have is gas mileage. anybody know what kind of mileage they get?
thanks,
John

hewlett2002000 · 08-26-2007, 12:46 AM

what would really be cool is to extend the front end so you dident have to cut into the cab!!! lol that might be my next project(if this one ever gets finished). i shouldent think like that. MY PROJECT WILL GET FINISHED!!!!!!!
John

ClassicAutoResto · 08-26-2007, 07:33 AM

It would be easier to cut into the cab and use a van engine cover though?

hewlett2002000 · 08-26-2007, 08:31 AM

yea that would be easier, but why take the easy way out? lol the hard part is the fun part.... sometimes
John

gulfcoast66 · 08-26-2007, 03:11 PM

talk about big block, thats one bad mother... i would love2 just have a running one on blocks!!!!!!

cst70rocket · 08-26-2007, 03:42 PM

This one may be for sale here in San Angelo,Tx.

07-29-2007, 12:22 AM	#1
ClassicAutoResto Rust Buster Join Date: Apr 2007 Location: Lebanon, Ky Posts: 558	1960 702 ci V12 How about one of these for your truck? Yes they were made for 60-66 chevy (large) trucks. This one would flip my cherry picker real quick. http://www.6066gmcguy.org/Jolly-702v12.htm or this one; http://www.6066gmcguy.org/TwinSix.htm jerry p.s. give anyone ideas for a mid engine 60-66 suburban? Last edited by ClassicAutoResto; 07-29-2007 at 12:28 AM. Reason: forgot some info

07-29-2007, 07:29 AM	#2
60ratrod yes, i do Join Date: Jun 2007 Location: Spokane, wa Posts: 2,734	Re: 1960 702 ci V12 makes homer simpson drooly noise........ me likey!!! would deffinatly be a sight to see at a carshow in one of our style trucks

07-29-2007, 10:00 AM	#3
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	Re: 1960 702 ci V12 omg i would love to get my hands on one of those for my truck. that would be bad ass. im going to eaither go with a caddy 500 or a ls1. im undecided but leaning tword the ls1. __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

07-29-2007, 10:12 AM	#4
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: 1960 702 ci V12 Good reading there. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

07-29-2007, 10:33 AM	#5
ClassicAutoResto Rust Buster Join Date: Apr 2007 Location: Lebanon, Ky Posts: 558	Re: 1960 702 ci V12 With that engine, I wonder if you would need to go with the front springs for an A/C truck? LOL Jerry

07-29-2007, 10:43 AM	#6
mbgmike Registered User Join Date: Aug 2005 Location: Pasadena,Tx /Pto Pta DR Posts: 5,415	Re: 1960 702 ci V12 Yeah I remember laying in bed at night as a kid and hearing the Old Wilson Freight down the road leaving the Terminal Late at night. They Had a Fleet of those trucks with those motors. They have there own unique sound. I kind of miss hearing them. I would love to have one.

07-29-2007, 10:46 AM	#8
ClassicAutoResto Rust Buster Join Date: Apr 2007 Location: Lebanon, Ky Posts: 558	Re: 1960 702 ci V12 I would love to hear one run. Here is another forum discussion I found on this engine. The 702 V12 was a gas engine,never was a diesel version of it. Notice JD's picture has two natural gas/propane carbs. The sparkplugs are on top of the heads between the valve covers and intake manifold. In later years,the 702 V12 was replaced by the 637 V8. Jon Hagen 12-19-2006 17:38:10 69.26.30.29 519260 Re: speaking of 2 stroke diesels in reply to Jon Hagen, 12-19-2006 17:20:21 Whups,I read JD's post again. The 702 V12 Was a factory built truck engine, built with a lot of V6 parts. The block,crankshaft and camshaft were one piece V12 units,exclusive to the V12, with 4 V6 351 heads and exhaust manifolds. It used 2 V6 351 intake manifold and carb assys. It had an odd distributor at the rear of the block with the dual points under a metal cover and two 6 cyl distributor heads,rotors,caps to fire all twelve cylinders. The 637 V8 was more powerfull and much more durable. The downfall of the 702 V12 was that looong spindly crankshaft. Most died from a broken crankshaft in truck use. Detroit Diesel,atleast in the 149 series,and I think smaller series,assembled V12 and V16 engines by bolting 2 V6 or V8 blocks together. They a special long alignment shaft to fit the main bores of both blocks to keep the mains in alignment while bolting the blocks together.

07-29-2007, 11:14 AM	#9
mbgmike Registered User Join Date: Aug 2005 Location: Pasadena,Tx /Pto Pta DR Posts: 5,415	Re: 1960 702 ci V12 Here is one of those bad boys. This is how dirty they usually looked too Some of theirs were factory and some of theirs were stretched and added on. the hoods were too short and they scabbed a section on kind of hap hazard. Most had two little wimpy exhaust pipes up the back .The picture is really of the 8V-71NE Powered truck. I wish I had a 12 v pic. They had the scabbed hood that looked even stranger. Looked like they had done it themselves. Attached Images Last edited by mbgmike; 07-29-2007 at 11:41 AM. Reason: added

08-22-2007, 11:35 PM	#11
slepysal Registered User Join Date: Oct 2006 Location: San Jose NOR*CAL Posts: 3,080	Re: 1960 702 ci V12 wow and only wow!!! __________________ 1960 Apache long bed fleet L6 250 Clifford intake 2 bbl carb. Langdon cast headers with dual exhaust and bellflower tips. T-5 5 speed, power steering and power disc brakes. "Over, Around or through it... "

08-24-2007, 11:08 PM	#12
ClassicAutoResto Rust Buster Join Date: Apr 2007 Location: Lebanon, Ky Posts: 558	Re: 1960 702 ci V12 Thanks for the link Tomsriv.....anyone have one to install?

08-25-2007, 01:09 AM	#13
68GMCCustom Truck and auto performance nut Join Date: Feb 2007 Location: McKinney,Texas Posts: 3,848	Re: 1960 702 ci V12 did y'all get a look at this project? check it out here: www.blastolene.com/B702.html __________________ Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken

08-25-2007, 02:09 AM	#14
Stepside65 Still Truckless! Join Date: Jul 2007 Location: Valrico, Florida Posts: 3,166	Re: 1960 702 ci V12 Hadn't seen it but is definitely very cool. __________________ ~James Truckless 2009 Hyundai Sonata<~~Wife's sedanomatic 1997 Nissan Pickup Father-in-law's tonka toy I am forced to drive Founder of The 60-66 Club Tutor Et Ultor

08-25-2007, 02:38 AM	#15
Dingfodgy Lemme show you something!! Join Date: Apr 2007 Location: St.Helens, OR. Posts: 876	Re: 1960 702 ci V12 I'll agree that the GMC factory beast is an impressive piece of nostalgia, but if you wanna s@t purple twinkies....check this out! http://www.falconerengines.com/prod04.htm There's an audio clip of this thing that is just effin' ear-candy. It sounds like a swarm of pissed off bees- straight out of hell itself! __________________ '67 CST-10 LWB ("Crusty") SOLD* '67 GMC SWB ("Murdock") 2000 K1500 Suburban ("Betty") '95 BMW 325i ("Joy") Last edited by Dingfodgy; 08-25-2007 at 02:41 AM.

08-25-2007, 11:25 PM	#16
ClassicAutoResto Rust Buster Join Date: Apr 2007 Location: Lebanon, Ky Posts: 558	Re: 1960 702 ci V12 WELL F.M.R. ........That's bad!

08-26-2007, 12:37 AM	#17
Woogeroo Registered User Join Date: Aug 2003 Location: tool box Posts: 3,115	Re: 1960 702 ci V12 http://www.6066gmcguy.org Jolly is good people... that is THE place to go if you have a 60-66 GMC truck. -W



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08-26-2007, 12:44 AM	#18
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	Re: 1960 702 ci V12 well i have to be honest, if i knew where to find one i would shoehorn it into my truck just to be different!!!! and im serious. the only second thought i would have is gas mileage. anybody know what kind of mileage they get? thanks, John __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

08-26-2007, 12:46 AM	#19
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	Re: 1960 702 ci V12 what would really be cool is to extend the front end so you dident have to cut into the cab!!! lol that might be my next project(if this one ever gets finished). i shouldent think like that. MY PROJECT WILL GET FINISHED!!!!!!! John __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

08-26-2007, 07:33 AM	#20
ClassicAutoResto Rust Buster Join Date: Apr 2007 Location: Lebanon, Ky Posts: 558	Re: 1960 702 ci V12 It would be easier to cut into the cab and use a van engine cover though?

08-26-2007, 08:31 AM	#21
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	Re: 1960 702 ci V12 yea that would be easier, but why take the easy way out? lol the hard part is the fun part.... sometimes John __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

08-26-2007, 03:11 PM	#22
gulfcoast66 64-66 CHEVY JUNKIE Join Date: Apr 2007 Location: Cypress ,Texas Posts: 1,516	Re: 1960 702 ci V12 talk about big block, thats one bad mother... i would love2 just have a running one on blocks!!!!!! __________________ 1966 C-10 Fleetside LWB, 350 Lt1 4l60-E 2008 Silverado Crew Cab, 4.8 4l60-E 1998 GMC Yukon 4x4 L-31 Vortec, 4l60-E 2017 GMC Serra 4x4 5.3 Vortec, 4l60-E Do It In A Chevrolet

08-26-2007, 03:42 PM	#23
cst70rocket Registered User Join Date: Sep 2005 Location: San Angelo or Eufaula Posts: 301	Re: 1960 702 ci V12 This one may be for sale here in San Angelo,Tx. Last edited by cst70rocket; 08-26-2007 at 03:44 PM.

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