New guy, new truck, new experience.

[H3llb1lly]

Howdy yall I just picked up this beauty a week ago. 86 Sierra Classic 4x4 5.0 700r4. showing 80k on the odo but its likely rolled over. its got some rust but the frame, body mounts, and suspension are all solid. The interior is showing SOME age but not a lot. power locks, windows, cruise (don't work), aftermarket head unit with a non working cd player and crap speakers. the 305 has had some work done, its got chrome valve covers, long tube headers, and a chrome air cleaner. true 4" lift with 35's. she runs and drives good and even shifts good after a two hour drive from picking her up. I eventually want to do an LS1 swap with a manual but keep the 4wd. if possible. I was told when I bought it that it had a crate engine but it don't look like that's the case. regardless I only paid $2700 for it. She needs brakes and an exhaust leak fixed but that's about it.
Ive got some mechanical ability so ill be doing most of the work myself. what I have tools for anyway. living in an apartment its hard to do. any advice or help yall can offer id greatly appreciate!