'86 Squarebody Tires/Rims Help

[Nobondo]

I am working on a squarebody with my high school shop class. Its a 1986 reg cab long box 2wd with a 305 v8. It currently has junk tires on it. 7" truck rallies in the front and 8" in the rear - 15" diameter.

I have been reading threads and can't seem to make heads or tails about tire sizes for this thing. It is just going to stay stock for now, but eventually an axle flip in the back and maybe a 3" drop in the front.

Should I be tracking down another pair of 8's for the front?

Ideas?