Join Date: Dec 2003
bluedragonx is offline
Re: LT1 into S10
But the answers to those questions can still be found in that thread, as well as elsewhere in this section if you look hard enough.
You also need to tell us what year your truck is and what engine was in it.
But to answer your questions...
Cooling, don't know, you didn't tell us what truck you have. But a 4.3 radiator will do you fine.
Fuel system, don't know, you didn't tell us what truck you have.
The headers are the same swap headers as for the gen I small blocks. Again, I can't give you a good recomendation without knowing what truck you have, some may have fitment issues, some won't.
As for the tranny crossmember, you may be able to use it as stock, you may not. Depends on your truck (which you didn't tell us anything about) and how far back you mount your engine.
Your best bet for wiring is to talk to Jared at Current Performance, he sponsors this section, links to his site are all over the place. I think he does harnesses for the LT1s, but you'll have to talk to him to find out. Of course, this depends on what your truck and old engine were as well...
As for difficulty, basic mechanic skills are needed, but you can make it as complicated as you want.
By the way, do you even have the engine?