i've done one before, i'm actually about to do it again because i want another coupe. as long as you have the wiring and cpu there are no real "problems" you're gonna run into and it's a lot better if all the wiring, cpu and engine came from the same car, if they're not, dont worry about it but it's just a little more assurance knowing they all worked together before. you have to change over the front and rear suspension (not really a "have to" but i'd recommend at least changing the struts and shocks), front brakes, rearend, fuel and brake lines, rack and pinion, brake master cylinder and booster, and of course, motor and tranny. it's easier if you have an entire V8 car to use as a donor because there are certain other things you need that you might not have such as double hump cross member. other than that, everything else is the same.