c20 conversion question

[Tigg]

I am building my first truck and its a c20. I am cutting it down to a short bed and making it a c10. My question is from what I have read on here the best way to convert the front end is a 73-87 for the disc brakes. Pardon my noobie question but I would like opinions before I buy more parts. I have found a 77 frame with a complete front suspension and rear end, that's it. with the wheels locally for $250.00. that should bolt up with minimal modifying in the front and give me a 1/2 ton rear too. I want to do a 4/6 or a 5/7 lowering kit. would all the brake stuff work still on the drop spindles still? does this sound like the right approach and a fair price for the set up? also would I buy the lowering kit for the 73-87 or still the 67-72. (told ya I am a welder/ sheet metal guy, suspensions are above my pay grade)

Im open for suggestions and thanks in advance!