As Chrispoe said, it will not bolt up to the stock transmission. I have seen them bolted to other FWD transmissions with adapter plates, but it's a tough engine to work with for numerous engines. Finding a clutch combo that works is tough
A RWD capri is going to handle like crap, just FYI. The chassis isn't made for it. I think you need to buy a cheap Miata, its' already RWD and has most of what you are looking for. The various Wankel rotary engines have been done in them before, as well as smallblock V8s of both Chevy and Ford breeds have been swapped in too. there's even bolt-in kits available if you have the bank $$ I've also seen them with Toyota and BMW powerplants and I'm sure many engines have been swapped too. Even an eco-modder put a 1.3L festiva engine in his MX5