I would say the forum thing is good, to get an idea. But he's right, look how many different ideas there are. I recently had a 451 built by the machinist I've used for the last 20 years. Took a while. We started it before I really knew how easy it was to do the 470. I didn't really want to do the 4.15" stroke. After the parts were acquired Andyf started posting up his build, I then started kicking myself. I would have done that. Too late oh well. The 452 will do the job. there were things I wanted to do, that my machinist wasn't into. In the end I told him what I wanted and he built it his way, so he could stand behind it.