Okay, I hope this doesn't sound to different, but the only engine i've ever seen in a vehicle is a 350, so I was wondering, how much of a difference is there in WIDTH between a 454 (bored to whatever) and a 383. I know there will be a difference, but how much? Considerably alot? I'm just planning for the future and whatnot. And also, what is a 454 bored .030" over, and 0.060 over? I can find out myself in a book, but I am too lazy right now... Thanks all!