Before you decide on a 472 or 500, do the research on parts availability and prices. Between the motor and transmission I've dropped almost 2K. I didn't even do a complete rebuild or change out pistons! They're pretty cheap to buy initially, but part selection is slim - meaning high prices! Google cad 500 performance and you'll only come up with a handful of parts suppliers. Not unbearable, but more expensive than a small block. That being said, I love the look, sound, and waiting to experience the feel of the motor! Plus it really freaks people out when you tell them what it is!