engine rebuild

Hello all. Life gets in the way, and stopped me from finding my X 1/9 when I was last here two years ago. Now I think I am in the right place in my career, and there is a kind local gent who has an '80 X 1/9 with 99,xxx miles that I'm going to look at tomorrow. The car smokes on startup, and...

I'm thinking of dropping my perfectly working but leaky 1500 FI engine with ?? confirmed miles on it (PO replaced the '81 motor with an '86) and rebuilding it but with some upgrades. So here's what I have: '86 1500 motor that's working well right now but needs leaks fixed and fuel rail...