Physically those engines will fit in just fine. With the 96, you may run into problems since the 96 is set up for DIS while you have a distributor. You may be able to use your front cover and be fine, but I'm not sure. Also, the heads, intake, and exhaust manifolds all changed in 96 as well. You could probably use your electronics on the 96 engine, but again I'm not sure since I don't know the exact differences, if any, in sensor placement and whatnot. Also I believe that the heater hoses differed between 96+ engines and earlier ones. If everything fits right into place, you'll benefit from an additional 5 hp. But keep in mind that if you use the 96+ manifolds, you'll have to use the 96+ exhaust, and that might be more trouble that you are looking for. You could, however, use your manifolds on the 96 heads. As for the SC motor, you'd have to get all the necessary wiring for the engine. This may or may not require you to change out wiring behind the dash or elsewhere in the car.
