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Old 07-29-2007, 12:22 AM   #1
ClassicAutoResto
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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
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Old 07-29-2007, 07:29 AM   #2
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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
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Old 07-29-2007, 10:00 AM   #3
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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.
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Old 07-29-2007, 10:12 AM   #4
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Re: 1960 702 ci V12

Good reading there.
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Old 07-29-2007, 10:33 AM   #5
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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
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Old 07-29-2007, 10:43 AM   #6
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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.
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Old 07-29-2007, 10:45 AM   #7
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Re: 1960 702 ci V12

Quote:
Originally Posted by ClassicAutoResto View Post
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.
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Old 07-29-2007, 10:46 AM   #8
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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
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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.
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Old 07-29-2007, 11:14 AM   #9
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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.
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Last edited by mbgmike; 07-29-2007 at 11:41 AM. Reason: added
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Old 08-22-2007, 09:48 PM   #10
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Re: 1960 702 ci V12

Quote:
Originally Posted by mbgmike View Post
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
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Old 08-22-2007, 11:35 PM   #11
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Re: 1960 702 ci V12

wow and only wow!!!
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Old 08-24-2007, 11:08 PM   #12
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Re: 1960 702 ci V12

Thanks for the link Tomsriv.....anyone have one to install?
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Old 08-25-2007, 01:09 AM   #13
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Re: 1960 702 ci V12

did y'all get a look at this project?





check it out here: www.blastolene.com/B702.html
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Old 08-25-2007, 02:09 AM   #14
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Re: 1960 702 ci V12

Hadn't seen it but is definitely very cool.
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Old 08-25-2007, 02:38 AM   #15
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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!
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Old 08-25-2007, 11:25 PM   #16
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Re: 1960 702 ci V12

WELL F.M.R. ........That's bad!
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Old 08-26-2007, 12:37 AM   #17
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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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Old 08-26-2007, 12:44 AM   #18
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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
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Old 08-26-2007, 12:46 AM   #19
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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
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Old 08-26-2007, 07:33 AM   #20
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Re: 1960 702 ci V12

It would be easier to cut into the cab and use a van engine cover though?
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Old 08-26-2007, 08:31 AM   #21
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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
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Old 08-26-2007, 03:11 PM   #22
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Re: 1960 702 ci V12

talk about big block, thats one bad mother... i would love2 just have a running one on blocks!!!!!!
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Old 08-26-2007, 03:42 PM   #23
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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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