8-lug disc brake conversion

[1970greenmachine]

Hello, all! I'm new here and looking for the 8-lug experts. I have a 1970 C-20 3/4-ton that has manual drum brakes all around (ugh). I'm looking to do an eventual 4 disc brake setup with a 14-bolt full floater rear end. I'm doing it in steps and want the front setup to start with. I got spindles, discs, and calipers from an '88 suburban in really good condition. Also picked up some new outer tie rod ends, but I heard I may need a special adapter sleeve to join my old inner tr's to these...? Also, which ball joints do I need: '88 suburban or '70 c-20? I know I'll need a proportioning valve: either aftermarket or one from a front disc/rear drum (for now) gm truck, right? Should I get other parts off the suburban (the rear is gone from it)?

Thanks