help with brakes on 1989 camero RS 2.8L 6cyl

What is your question?

recently bought a 1989 camero RS that had been sitting for a year or so. Had quite the time getting it running but with some help from u guys I finally did yeeeeeey :-)thank u for the advise it was very helpful and it runs very well now. but now I have moved to the brakes. Calipers were locked up on rotors and caliper pistons locked up as well. Got them off and got new calipers and pads for front, rear drum brakes seem to work ok. blead the rears fine but cant get any bleed out of either front brake about to check lines after it stops raining other than that what else could cause this problem? if the rear work booster should be ok right? don't know to much about brakes lol any ideas will help thanks.