I used a transmission of a toyota celica (=solara?) with a 3sge engine. I need the gear linkage at the back and a mr2. I connect the gearlinkage not with cables, but with the original levers of my car.

The 12A (manual gear) flywheel is pretty big. To big to fit in the original bellhousing of my car. The toyota gearbox has a big bellhousing.
I didn't want to do it with a counterweight of a automatic 12A and fit an other flywheel. These counterweights are rare in europe and i cannot do the machining of the flywheel myself. I don't want to spent any money at this project as long i'm not sure it will succeed.

I have used 12mm steel as a adapter plate. It sounds a bit heavy, but it is not that bad. I prefer steel over aluminium because i have moer faith in treathed holes in steel instead of alu.
The input shaft of the transmission doesn't have a center axle. So that's a worry less. The inputshaft is cut a little shorter (just a few mm) but it might be not nescesarry. I shortend it because i first planned to do a 8mm adapterplate. With a 12mm adapterplate cutting might be not nescesarry.

The best thing about the toyota tranny is the starter motor. Most other transverse engine's have the startermotor alongside the engine. But the toyota
has the starter on top of the tranny. The sprocket of the toyota seems to match the 12A flywheel. The position of the starter needs to move a few mm outward and away from the engine.

I use the 12A pressureplate with a toyota clutch disk.

Just need to find one of these....