4.3 vortec to 5.7 tbi

[zachjacobs223]

Ok yall I really need help I have a 96 c1500 5 spd with a 4 3 vortec I'm being giving a 5.7 tbi motor and I need to know what all I need to do for this swap I'm so confused and can't find anything online pls help.

 

[99xcss4]

why are you puting in a tbi engine and not a 350 vortec

 

[Drunkcanuk]

Easy is motor mounts to start with, as V6 and V8 are different.
And going to need a ECM from a 350 TBI manual truck and the wiring to go along with it to make it as painless as possible.
V8 radiator would be a good idea as well.
Sure there will be some wiring difference as well, so wiring diagrams from both years to see where you will need to tie in.
This is just off the top of my head.
I'm sure others will throw more work at you.