Small update, working on fitting a radiator and fan setup from a 89-94 Maxima. The radiator has similar dimensions to the Supra but the outlets are crossed. Also, it's aluminum.
The fan shroud and fan mounts have taken a whole lot of adjusting, but it should go. The biggest part of the job is redoing the bottom mounts. The nissan isolators drop into the Toyota mounts, but are offset about 1". Tempted t use wire, I instead drilled out the spot welds, moved the mounts over, and re-welded. Sounds easy, but not very (you know, with an engine in the way and whatnot).
Here's the relocated mounts. From this angle, it's impossible to tell that they've been molested:
Nissan isolators drop right in like they're supposed to go there:
The view from underneath. Undercoat keeps the rust away:
Radiator and fans dropped in:
The whole setup sits about 1/4" taller than the Supra. Should be plenty of room to the hood (in this area at least). I used a portion of the Nissan upper radiator hose. I'll have to try the Trailblazer lower radiator hose. Need to fab upper mounts and wire the fans. Anybody know why there would be 4 wires to each fan?