A guy from our club has put a 3S-GTE in his AE101.
His car was actually a 1300cc engine (4E-FE) and those mountings are different than the 4A engines. From what he told me, the 4E-FE mounting points were a better base to start from than those of a 4A engine, because they really don't line up (A 3S engine is tilted in the engine bay)
Off course, you can make it all fit. But don't expect it to be easy or plug and play. If you're not willing to spend serious money on it and do some (heavy) modifications, don't even start on it
But it is a nice project. Good luck!
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Driving : '92 Toyota T19 Carina E GTi
Repairing : '92 Toyota AE92 Corolla Hatchback GTSi
Restoring : '88 Toyota AE92 Corolla Coupé GT-S
My personal website:
http://www.corollaae92gts.nl