I will agree with ZX1100F1
that they are almost identical. Almost being the key word. I am not sure but I think it should be a direct drop in to include the wiring harness, except for the fuel system and the computer. In 96 when they started the Vortec they had Central Sequential Fuel Injection. That should be what you have. If I remeber right they started putting Muti Port Fuel Injection on in 97. You should be able to get a wiring harness and a computer for that. If you know what it came out of and you want to know if the alternator and all that are the same go to a parts store and have them look them up for yours and for whatever the engine came out of. I think the fuel injection and computer is all that is different.