'77 Van pieces interchange with '72 GMC - The 1947 - Present Chevrolet & GMC Truck Message Board Network

grancuda · 11-12-2007, 09:46 PM

I am looking at buying a '77 Chevy 1/2 ton van for $500 that has the stock motor rebuilt with about 2 years worth of miles and was parked 4 years ago. I am trying to decide what all I can use to convert my I6 to a 350 on my '72 GMC 1/2 ton. I think I am going to leave mine a 3 speed manual for now but haven't decided for sure, wouldn't mind doing a 700R4.

pros: early style HEI, early style 350 manifolds-not 305 logs, 6 month of use on a new Edelbrock carb, good base engine for a daily driver.

unsure: will the motor mounts work from the van or will my stock straight 6 mounts work with the 350, will the crank be drilled for the pilot bushing, how will my Z-bar mount up, will the crank of the 350 be drilled the same as my 250 I6 for the flywheel, will the radiator fit-the top mounts look the same, if I use the turbo 350 will my cross member mount up to it, can I rob the swaybar from it and put it on mine, could I save the calipers for mine for spares as well as the spindles/hubs/discs????????

cons: getting rid of the turd van when I am done

see ten · 11-12-2007, 09:48 PM

We tried to swap a van swaybar over once and it wasn't even close.

1969k10stepside · 11-12-2007, 09:51 PM

For $500 I think it would be worth it.The motor would be worth half that.I got about $200 for one van minus drivetrain scrapped.Dont forget it should have a tilt column easily adapted to a truck!

Longhorn Man · 11-12-2007, 10:19 PM

you could sell the tranny for 150 or so
The seats may be of value to you
if it has a tilt, it's the one that works
if it doesn't have a tilt, the fiber optic cable for the perndl (P RND21) indicator will work on your truck, or mose stuff to sell.
Heard of ppl using the rad
heard of ppl using the shroud
no idea on motor mount stands
engine is a no brainer.
Manifolds may or may not be useable in the truck frame
I don't think you'll be able to use anything in the front suspention

if you use the 3 speed, it would be easiest to place the 350 in the inline 6 location...you can use the stands that are there already (assuming 250 and not 292)

11-12-2007, 09:46 PM	#1
grancuda Registered User Join Date: Nov 2007 Location: Central OK Posts: 396	'77 Van pieces interchange with '72 GMC I am looking at buying a '77 Chevy 1/2 ton van for $500 that has the stock motor rebuilt with about 2 years worth of miles and was parked 4 years ago. I am trying to decide what all I can use to convert my I6 to a 350 on my '72 GMC 1/2 ton. I think I am going to leave mine a 3 speed manual for now but haven't decided for sure, wouldn't mind doing a 700R4. pros: early style HEI, early style 350 manifolds-not 305 logs, 6 month of use on a new Edelbrock carb, good base engine for a daily driver. unsure: will the motor mounts work from the van or will my stock straight 6 mounts work with the 350, will the crank be drilled for the pilot bushing, how will my Z-bar mount up, will the crank of the 350 be drilled the same as my 250 I6 for the flywheel, will the radiator fit-the top mounts look the same, if I use the turbo 350 will my cross member mount up to it, can I rob the swaybar from it and put it on mine, could I save the calipers for mine for spares as well as the spindles/hubs/discs???????? cons: getting rid of the turd van when I am done Last edited by grancuda; 11-12-2007 at 09:47 PM.

11-12-2007, 09:48 PM	#2
see ten WTB this ad Join Date: Sep 2004 Location: Lafayette Georgia Posts: 5,074	Re: '77 Van pieces interchange with '72 GMC We tried to swap a van swaybar over once and it wasn't even close.

11-12-2007, 09:51 PM	#3
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,019	Re: '77 Van pieces interchange with '72 GMC For $500 I think it would be worth it.The motor would be worth half that.I got about $200 for one van minus drivetrain scrapped.Dont forget it should have a tilt column easily adapted to a truck!

11-12-2007, 10:19 PM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: '77 Van pieces interchange with '72 GMC you could sell the tranny for 150 or so The seats may be of value to you if it has a tilt, it's the one that works if it doesn't have a tilt, the fiber optic cable for the perndl (P RND21) indicator will work on your truck, or mose stuff to sell. Heard of ppl using the rad heard of ppl using the shroud no idea on motor mount stands engine is a no brainer. Manifolds may or may not be useable in the truck frame I don't think you'll be able to use anything in the front suspention if you use the 3 speed, it would be easiest to place the 350 in the inline 6 location...you can use the stands that are there already (assuming 250 and not 292)



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