My 1st Build

[72_Chevy_Cos]

I got a 72 c10 that I'm looking to make fast. My plan is to rip out the I6 and transmission and throw in an LS motor with a TH400 auto. it needs a lot of body work but the frame is solid. Questions:

1. Recommended fuel cell type (poly, aluminum) and size?
2. What all would be needed as far as front end work aside from a new steering column?
3. Work required for underbody as far as getting new equipment to bolt up goes?
4. Vehicles I could buy as a donor that have said transmission and engine that i could pull the rear end out of and still be close?

This is the first project vehicle that I've bought and I'm feeling a little overwhelmed. I've done extensive engine and body work, a little transmission work. I have the know-how to do it all but getting the right parts is becoming kind of a sh** show. Not looking for anyone to do the build for me, I just need pointed in the correct starting direction.