Charmant shares alot of body parts with 79-83 corolla.
Most of the engine parts and foundations are same as that of AE72 and AE86.
You can swap many engines easily like 4k,5k,7k,3TC,4AU without much hassle.
In performance engines you can have 2T ,2TB and of course legendary 4age.
Finding a 16V 4age will be difficult but you can try that. Other option is converting a FWD 20 Valve to RWD. But for that I will say search the internet thoroughly and import a distributor reallocation kit before doing any other thing otherwise you may have to sacrifice a portion of your fire wall.