This is a good point. I was wondering the same things. What is it that you're looking for? Models are models and there is no limit to your possibilities and creativity. That being said however, I personally wouldn't put a 354 Caddy in a '72 Chevy C10. A big block or small block Chevy engine or even a straight six would be more appropriate. But like I said, it's your model. You can put a WWII airplane engine in it if you'd like. So I guess I ask the same questions, what are your questions?