Welcome fellow mx32'r! I just got done doing the t3 coilover setup. I figured out the perfect solution for the rear springs. You use ae86 trd or swift front springs. I happened to have an extra set of 6kg/mm trd front springs for my ae86 and figured i would give that a shot. Turns out, perfect drop and fitment for my 15in work equips. I also did a big brake swap for the front. I got a set of spindles from an 85 cressida wagon. The cressida wagons have smaller brakes for some reason. But the calipers were shot. So i took a chance and ordered some rebuilt calipers and some brembo rotors for an 88 cressida and they fit on the mx73 wagon spindles perfect. Way better brakes. Vented and larger than the mx32 stock setup. Who knows how the master cylinder will like them. But that is for later. So there is some actual wisdom about a couple of parts of building an mx32. Internet wisdom about the diameter of the rear springs is WRONG. It is not the size of the ae86 rear and it is not 5.5od. They are infact 5.25 od on one side and 5.5 od on the other. If you have any questions please feel free to pm me. I'll probably post some good build thread info in the coming weeks.
I'm sure that all us 32ers would love to see that thread. I've been holding off on cutting mine waiting to find some solid answers.