im not an expert but you could put any engine in any car that had a big enough engine compartment its just a matter of money. if you dont want to spend too much money your best bet would be a v6. you could probably get one in there without too much trouble. i have an 83 rx7 and the engine compartment is pretty big. also since they are rear wheel drive to make it easier you could get a v6 from a RWD car. im not sure tho if it would be easier to modify the engine to fit the tranny or buy the engine and tranny and modify the trans to fit the propeller shaft. how about an older supra engine - that would be awesome. again im not an expert you should probably get a second opinion in case i said something wrong.