Going to document my conversion here so anyone can access the info I'm currently trying to track down.
So far I have purchased an mtx 89 f2t from a shop that has a 30 day warranty, and also stripped a high mileage 89 auto 626 gt of its wiring, ecu, sensors, piping and anything else I could think of.
Currently searching through wiring schematics for the function of the 89 626s body harness where the engine harness would connect.
So far there are 3 plugs in question. A 6 pin plug with 5 wires by the ignition coil, then a 4 pin plug by the ecu, followed by a larger white plug (15 wires or so) that runs up the back of the dash.
I'm going to my 91 626 tomorrow to start the work. Essentially going to focus on the wiring as the mechanics won't be a hassle. Seriously contemplating wiring the F2 with the 89 F2T harness first lol it's just the intake manifold assembly and distribution really.