can I install a 1990 350 gmc truck motor in 1996 gmc pickup w/ a bad 350 vortec(rod Knock)?

Asked by Jul 07, 2010 at 01:20 AM about the 1996 Chevrolet C/K 1500

Question type: Car Customization

I have a 1996 gmc pickup with a 350 vortec motor.The motor runs, but has a rod knock.
I have a newly rebuilt 1990 chevy 350 out of a chevy truck that runs great. Will I be able to use the 1990 motor in this truck ? If so, what will I have to do to make it work properly?
It would be great if all I had to do was put the vortec intake and or vortec heads on the 1990 motor and be done with it.
HELP!!!!!!

5 Answers

105

It's been my understanding that Vortec heads won't fit other SBC styles... I'd install whole motor into the truck.It would bolt up to the tranny easily The computer would prolly need to be switched out for the one from the 1990 though.

35

the heads n intake should bolt up on the 1990 block, ive heard of people doing it

55

Yes the heads and intake are different but all you have to do is switch then from the 96 to the 90 and then you dont have to change anything else.

2 out of 2 people think this is helpful.
25

it will just bolt right up. just take the hardware off the vortec and put it on the 90 block. you should be good with that. and if you have any questions check out the fullsizechevy forum

2 out of 2 people think this is helpful.
50

Can I do the reverse? I had some head gasket work done on my 1996 Yukon 350 vortec, found the heads were no good and put heads from a 1994 350 on it. Running rough and stalling at idle. Could it be the heads are not compatible?

5 out of 5 people think this is helpful.

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