HS auto class 64 brake conversion

[Mwalter]

Hey everyone, newbie here. I teach automotive at an central texas high school. We just picked up a 64 c10 longbed stepside w/ a 283 for a student project. We got a pretty good deal on it due to some wiring issues which the students already took care of. Next is the front disc brake conversion, this is where I need to double check to make sure I read all the previous disc brake conversion threads correctly.

We found a set of 85 spindles and calipers. Can we reuse our 64 lower and upper control arms if we swap to 85 balljoints? Also after calling our parts supplier, I was told all the 85's have a 5 lug rotor, so what rotor is best to be used?

We're on a budget, so we're hoping we can get away with keeping the original control arms. Thanks!