whats the difference....I dont know

Bill, nobody was being rude. He was simply trying to let you know it would be a good thing to learn the difference. There are plenty of good books out there on the big block Chrysler engine. I love a good technical book. You should check around and find one you like. Maybe some of the guys here can recommend something. Bill, we all started somewhere. You can paint like a big dawg. I would be willing to bet very few of us here can. So you got one up on a lot of people here. Nobody can know everything.