what do i need to do to swap a 3.4 v6 with a 5.7 lt1? wiring, tubing, anything that would need to be replaced

 

Motor
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It has been covered several times that I've read, and the consensus seems to be that it's not worth the trouble. You can pick up a 93-95 Z28 for pretty cheap these days, so unless you have a donor car already in your posession as well as some serious fabrication capability, it's going to be more money than just buying the whole new car.

If you have the time and skills though, it would be a fun project.

Good luck either way.

 

i already have a donor car and the lt1. i have two cars one is a wrecked z28 and the other is a v6. the v6 is the donor car. i have everything to make the lt1 run and i have everything to make the v6 run. i just need to swap them.