Crx question

[C's 94 InTeGrA]

Aight this is for my buddy. he has a 91 crx. Well when he bought this car it has been wreaked about 5 times and the guy who had it before put a lot into the engine and there has been a motorswap out of it. and me or him have no idea wat kind of motor it has now.. its a single cam 16 valve. everything has been changed and there is no details to say which motor it could be. well there is a guy who is trying to sell a 1.6 si motor out of a 88 crx to him for like 200$. and also a question on the fuel injection..on a 1.5 is it 4 or 1 or on a 1.6 4 or 1?? apprecite it if anyone knows we need to find out pretty quick