350 to 454 swap

hiltijoe · Jun 26, 2017

I'm swaping the motor on my v20 to a 454 out of a 94 burb will the computer be compatible w it any issues I should be concerned about?it should be a easy swap I'm thinking thanks all

hiltijoe · Jun 26, 2017

its now a 350

Honky Kong jr · Jun 26, 2017

Check this out gotta look around a bit.http://www.gmsquarebody.com/threads/project-willy-lee-1987-v10.18088/

1987 GMC Jimmy · Jun 26, 2017

If you're just using your '87 harness and ECM, you should be fine. The TPS sensor has a different connector so you'll need to swap those, and make sure to swap the intake manifold sensor carrier from your old one to the new one because, unless the '94 was a standard transmission, it didn't have the ESC module outside the ECM like the old ones did. The 454 of that year used a 30 pound fuel pump, and the 350 never did. The '87-'93 454's shared the SBC pump so it'll clearly work with both. I'm not sure if the ideal solution there is to swap or leave it alone.

hiltijoe · Jun 27, 2017

it is a auto I'm getting.thanks for the input

4WDKC · Jun 30, 2017

hiltijoe said:
it is a auto I'm getting.thanks for the input

You will need to find a chip for the 87 from an 87-91(I think) with a 454 as the 359 wont have the correct fuel and spark tables. Also if you are taking the tranny from the 94 you will need a computer to operate it unless its a manual. Best bet is take everything from the 94 you can so you have it if needed.

350 to 454 swap

hiltijoe

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hiltijoe

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Honky Kong jr

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1987 GMC Jimmy

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