I came here looking for a Guru; Transmission Swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

'72_GMC · 08-04-2008, 10:30 AM

Last week I got lucky, I found a '72 GMC BB Camper Special, it has a New 402 BB, a New Turbo 400, with all new supporting accessories, New Radiator, New Carburetor, All new Brakes, even new Brake lines, New tires, New Tail Gate, Even a new WW wiper motor, Not a Dent, One rusty Rocker panel, Just a Real nice truck, Somebody Traded it in at the Ford Dealership and when I heard the Price, I bought it without even starting it, they said they didn't have the key and one look at the shiny new Big Block and I didn't care. I went inside and payed for it.

Coming back out to see what I had bought, the Manager guy said I could start it with a Screw Driver. Some assistant manager followed me back to the truck with 2 Screw Drivers Cool! I stuck one in the ignition switch and turned, the whole lock Turned, and turned, and turned some more, after about 3 revolutions I reached up behind the dash to stop it turning, fearing for the wiring harness and................ Uh, Oh, no worries, Looking to confirm, There is no Wiring harness, Not a piece of wire in the whole truck! Ahhhhhhhhh

I went home and got my Van and Towbar, Towed it home

Well I have this '71 1 Ton 3500 Flat bed 4 Sp parts truck out back behind the house, I was always going to fix that, it's a little Moss covered and Rusty but it had the 4 sp and I like that, anyway for about 3 days I pulled the wiring harness out of it and put it in the new and much more beautiful '72, Cool, Works Great, Except the Reverse light wiring is too short, and no Transmission down shift circuits, OH! No neutral safety switch either, careful.............

The Dilemma; to, Repair the wiring harness with the addition of some small circuits or keep swapping stuff over from the other truck. I like the manual Gear. Problem is, and this is my Question, it looks like the BB is longer then the small block, it looks like it is mounted, or allowed to Extend further back in the truck, The 4 sp Truck is a small block, It Appears, if I mounted the Crossmember to the frame, and the Bellhousing to the Motor, it appears the motormounts would not line up, it looks like they would be too far back in the truck.

My Guru question, does the BB trucks have the same Crossmember?

Is it the same for a 3/4 ton as a 1 Ton?

And Just in case the rest works out, Can I use the flywheel from the 350 on the 402?

shaneschevys · 08-04-2008, 12:22 PM

Welcome from FT Worth TX.

72BlckButy · 08-04-2008, 02:31 PM

to the board from Mid-MO!!!

You'll find this place to become your second home. There's tons of information, friends, parts, .... and so much more.

jsbgump · 08-04-2008, 02:57 PM

Welcome to the board from Texas

krue · 08-04-2008, 03:03 PM

Welcome to the board from South Mississippi!

You may need to ask on the 67-72 Message board for a good answer to your question.

'72_GMC · 08-04-2008, 04:26 PM

Thank-you Krue, I will give that a try

redneckgirl · 08-04-2008, 05:56 PM

Welcome to the site from Maryland!

DREAMS OF A 67 · 08-04-2008, 06:31 PM

FROM KNOXVILLE TN!!!

Cyclone44 · 08-04-2008, 07:01 PM

from Knoxville Tn....

chevguy7 · 08-04-2008, 07:18 PM

Welcome from Seattle!

Jerry Jones · 08-05-2008, 01:04 AM

Welcome aboard frome Northern California!

babyJay · 08-05-2008, 12:35 PM

Hi, and welcome, from Indiana.

**FRENCHBLUE72** · 08-06-2008, 09:53 AM

Welcome to the board from southern oregon..

BACKYARD88 · 08-06-2008, 12:27 PM

from South Texas!

'72_GMC · 08-06-2008, 02:29 PM

Thankyou for all the Welcomes, Has any body even seen a Stick Shift Big Block Truck in 2WD?

L0WRIDE · 08-25-2008, 03:44 AM

Welcome to the boards

08-04-2008, 10:30 AM	#1
'72_GMC Registered User Join Date: Aug 2008 Location: Graham, WA Posts: 54	I came here looking for a Guru; Transmission Swap Last week I got lucky, I found a '72 GMC BB Camper Special, it has a New 402 BB, a New Turbo 400, with all new supporting accessories, New Radiator, New Carburetor, All new Brakes, even new Brake lines, New tires, New Tail Gate, Even a new WW wiper motor, Not a Dent, One rusty Rocker panel, Just a Real nice truck, Somebody Traded it in at the Ford Dealership and when I heard the Price, I bought it without even starting it, they said they didn't have the key and one look at the shiny new Big Block and I didn't care. I went inside and payed for it. Coming back out to see what I had bought, the Manager guy said I could start it with a Screw Driver. Some assistant manager followed me back to the truck with 2 Screw Drivers Cool! I stuck one in the ignition switch and turned, the whole lock Turned, and turned, and turned some more, after about 3 revolutions I reached up behind the dash to stop it turning, fearing for the wiring harness and................ Uh, Oh, no worries, Looking to confirm, There is no Wiring harness, Not a piece of wire in the whole truck! Ahhhhhhhhh I went home and got my Van and Towbar, Towed it home Well I have this '71 1 Ton 3500 Flat bed 4 Sp parts truck out back behind the house, I was always going to fix that, it's a little Moss covered and Rusty but it had the 4 sp and I like that, anyway for about 3 days I pulled the wiring harness out of it and put it in the new and much more beautiful '72, Cool, Works Great, Except the Reverse light wiring is too short, and no Transmission down shift circuits, OH! No neutral safety switch either, careful............. The Dilemma; to, Repair the wiring harness with the addition of some small circuits or keep swapping stuff over from the other truck. I like the manual Gear. Problem is, and this is my Question, it looks like the BB is longer then the small block, it looks like it is mounted, or allowed to Extend further back in the truck, The 4 sp Truck is a small block, It Appears, if I mounted the Crossmember to the frame, and the Bellhousing to the Motor, it appears the motormounts would not line up, it looks like they would be too far back in the truck. My Guru question, does the BB trucks have the same Crossmember? Is it the same for a 3/4 ton as a 1 Ton? And Just in case the rest works out, Can I use the flywheel from the 350 on the 402?

08-04-2008, 12:22 PM	#2
shaneschevys Its always something! Join Date: Aug 2005 Location: FT Worth,TX Posts: 4,992	Re: I came here looking for a Guru; Transmission Swap Welcome from FT Worth TX. __________________ 79 p10 stepvan 72 Short Fleetside 72 Suburban 67 GMC One Ton Flatbed 64 Short Fleetside 57 Chevy 2DR Hard Top 57 Chevy 2dr wagon 65 f* short fleet 63 C 60 Flatbed Member of the patina club**

08-04-2008, 02:31 PM	#3
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: I came here looking for a Guru; Transmission Swap to the board from Mid-MO!!! You'll find this place to become your second home. There's tons of information, friends, parts, .... and so much more. __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

08-04-2008, 02:57 PM	#4
jsbgump Gone Fishing Join Date: Aug 2005 Location: Fort Worth, Texas 76135 Posts: 12,361	Re: I came here looking for a Guru; Transmission Swap Welcome to the board from Texas __________________ 68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616

08-04-2008, 03:03 PM	#5
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: I came here looking for a Guru; Transmission Swap Welcome to the board from South Mississippi! You may need to ask on the 67-72 Message board for a good answer to your question. __________________ "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"

08-04-2008, 04:26 PM	#6
'72_GMC Registered User Join Date: Aug 2008 Location: Graham, WA Posts: 54	Re: I came here looking for a Guru; Transmission Swap Thank-you Krue, I will give that a try

08-04-2008, 05:56 PM	#7
redneckgirl Registered User Join Date: Jun 2006 Location: Bel Air, Maryland Posts: 4,853	Re: I came here looking for a Guru; Transmission Swap Welcome to the site from Maryland! __________________ The place where you made your stand never mattered. Only that you were there... and still on your feet. Stephen King

08-04-2008, 06:31 PM	#8
DREAMS OF A 67 Step Brother Join Date: Sep 2007 Location: knoxville TN Posts: 1,950	Re: I came here looking for a Guru; Transmission Swap FROM KNOXVILLE TN!!! __________________ Joe

08-04-2008, 07:01 PM	#9
Cyclone44 Step Brother Join Date: Sep 2007 Location: K-town Posts: 4,029	Re: I came here looking for a Guru; Transmission Swap from Knoxville Tn....

08-04-2008, 07:18 PM	#10
chevguy7 Registered User Join Date: Oct 2006 Location: Washington Posts: 316	Re: I came here looking for a Guru; Transmission Swap Welcome from Seattle! __________________ 1970 C10 - ECE 3.5/5 drop, dual exhaust with turbo mufflers, front discs http://67-72chevytrucks.com/vboard/s...d.php?t=272458 2000 Buick Regal GS - Supercharged 3.8 V6 240hp, 1/4 mile 15 seconds

08-05-2008, 01:04 AM	#11
Jerry Jones Happy Camper Join Date: Feb 2006 Location: Northern California Posts: 8,408	Re: I came here looking for a Guru; Transmission Swap Welcome aboard frome Northern California! __________________ RIP El Jay! Love you brother!

08-05-2008, 12:35 PM	#12
babyJay Arrived on a Pale Horse Join Date: Mar 2007 Location: SnagTown Indiana Posts: 2,524	Re: I came here looking for a Guru; Transmission Swap Hi, and welcome, from Indiana. __________________ Jason 87 V30 350TBI/400 White w/Boss V-plow 89 R3500 CC SRW

08-06-2008, 09:53 AM	#13
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,590	Re: I came here looking for a Guru; Transmission Swap Welcome to the board from southern oregon.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

08-06-2008, 12:27 PM	#14
BACKYARD88 On the fast track to nowhere.. Join Date: May 2006 Location: Splendora, Texas Posts: 5,316	Re: I came here looking for a Guru; Transmission Swap from South Texas! __________________ -Mike Owen- Support the board here! 71 Chevy short fleet build thread Double D Norwood, Houston, Cecilia, Jackson, Monroe and counting

08-06-2008, 02:29 PM	#15
'72_GMC Registered User Join Date: Aug 2008 Location: Graham, WA Posts: 54	Re: I came here looking for a Guru; Transmission Swap Thankyou for all the Welcomes, Has any body even seen a Stick Shift Big Block Truck in 2WD?



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08-25-2008, 03:44 AM	#16
L0WRIDE Registered User Join Date: Jan 2005 Location: AUCKLAND, NEW ZEALAND Posts: 2,166	Re: I came here looking for a Guru; Transmission Swap Welcome to the boards __________________ 49 CHEVROLET 1/2 TON, 52 CHEVROLET SEDAN 62 HARDTOP NOVA 65 CHEVROLET BB LWB FLEETSIDE 90 CHEVROLET EXTRA CAB CHEVY ONLY - NZ Chapter http://67-72chevytrucks.com/vboard/s...d.php?t=137984

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