Swapping a V-6 for a V-8... Help? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**67 cst swb** · 09-30-2011, 04:22 PM

I am going to swap a 350 V-8 into a '65 1/2 ton 4x4.
It has the factory V-6 in it now.
I plan to keep the stock Manual Trans.
Assuming I will need change:
* Bellhousing (and possibly a trans x-member)
* Radiator (I may need a larger one or correct one for a V-8 350 ??? )
Here are my questions?
Will the V-8 mount onto the frame mount brackets if I change to the V-8 rubber motor mounts from a 67-68 chevy truck style rubber mount? Also, What else will I have to change?

I have numerous doner parts from various 67-72 parts trucks, but this is my first 4x4 effort.

Any and all help is appreciated...

Thanks...
Bryan

pope · 09-30-2011, 05:08 PM

I put a 305 v6 in a 60 GMC K20 a while back, and the motor mounts in it were different. They were mounted at the front of the block as the small block stuff is more centered. The V6 housings were different from the small block housings as well, but do use the same mounts so that won't be a problem for you. If you havn't done it yet talk to
A.T. rockdriller and check out his build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=453161
He runs the big 6 in his K1000 GMC. Keep us updated on your build, I like to see these K series builds!

09-30-2011, 04:22 PM	#1
67 cst swb Senior Member Join Date: Nov 2001 Location: Rapid City, SD Posts: 2,281	Swapping a V-6 for a V-8... Help? I am going to swap a 350 V-8 into a '65 1/2 ton 4x4. It has the factory V-6 in it now. I plan to keep the stock Manual Trans. Assuming I will need change: * Bellhousing (and possibly a trans x-member) * Radiator (I may need a larger one or correct one for a V-8 350 ??? ) Here are my questions? Will the V-8 mount onto the frame mount brackets if I change to the V-8 rubber motor mounts from a 67-68 chevy truck style rubber mount? Also, What else will I have to change? I have numerous doner parts from various 67-72 parts trucks, but this is my first 4x4 effort. Any and all help is appreciated... Thanks... Bryan __________________ My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White

09-30-2011, 05:08 PM	#2
pope Registered User Join Date: Dec 2010 Location: Belgrade, Mt Posts: 130	Re: Swapping a V-6 for a V-8... Help? I put a 305 v6 in a 60 GMC K20 a while back, and the motor mounts in it were different. They were mounted at the front of the block as the small block stuff is more centered. The V6 housings were different from the small block housings as well, but do use the same mounts so that won't be a problem for you. If you havn't done it yet talk to A.T. rockdriller and check out his build thread http://67-72chevytrucks.com/vboard/s...d.php?t=453161 He runs the big 6 in his K1000 GMC. Keep us updated on your build, I like to see these K series builds!

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