I've written this here a few times and it can probably be found by searching. But I'll do it again.
Ours was a Gen 3 in a 100 series Hatch which originally had a 2E. We used the engine, gearbox, driveshafts and hubs from the ST202 Celica.
On the gearbox end we hung the Celica mount from the bracket with no modification.
Once done the STD Celica engine mount at the cambelt end sits squarely in the middle of the chassis rail but needs to be raised by 10mm.
We did this by welding in a very simple bracket to which we had welded two captive nuts.
Now the motor will sit square & level but will swing from back to front.
The rear gearbox mounting bracket will then line up with the mount on the crossmember but the hole will likely be in the wrong place.
We removed the rubber and machined up a nolathane replacement.
Bolt it up, set the motor where you want it, mark where you want the hole, drill and insert the steel collar.
It is now a simple matter of making a bracket to mount the front mount to the longitudinal crossmember which will be about 20 or 30mm out of alignment.
The only problem that we had was that this positioned the unit 20mm out of centre which we fixed by using one driveshaft from an ST182 and having another custom made.
It may have been a bit simpler moving the hole in the gearbox end bracket out 20mm and down 10mm. I cannot recall whether that was possible.
Deane Buists car used the 3SGE engine with the C series gearbox and was quite a bit of work I believe.
Original TRD JGTC Corolla 3S powered touring car (now locally owned)below. Quite possibly the same car as in Truenotch's picture.