magnus need your help ls1 swap

[therock]

how hard would it be to swap an ls1 to a 3.8 i already have the 3.8 pulled outalong with the tranny so how hard would it be im thinking it would just be the wiring that could be tricky but other than that i found a great z28 parts car for 1500 and i was wondering if i had all the parts from it would it be much easier

[Magnus]

http://www.dxsoftware.com/magnus/v8swap.htm

Has all the answers.

It's up to you if you want to turn wrenches and remove bolts and such.

[therock]

as far as wiring would it be better just ro rip all the old wiring otu and put the z28 wiring in there or would they not be able to work

[John_D.]

It's best if the donor car is the same year. Then the wiring is a lot more straightforward.
I believe the biggest difference is between '98 and all the others.

Your v6 car will have a return line from the fuel rail, and the v8 fuel rail won't have a return.

You'll have to convert over to the v8 fuel system (pump/tank with no return line), or put a 97 'vette rail on it which has a return line and use your tank and pump. (but you'll probably want to upgrade the pump to a walbro anyway for volume)

You'll need the v8 tranny too, so it should be the same type (auto or manual) as your car. Same for the pcm, the tranny type should match.

[Magnus]

use a 99+ wiring harness and you will have 2 wires or so to modify. I believe I mentioned that in my web page.

Fueling is all custom. It's fun stuff.