OK...For a 72 Challenger, brother has a 4 pulley setup that bolts to the balancer? (pardon me If I get something wrong here....I don't know much about the engines, etc .....just like to drive them....lol)there is another pulley above it....I think he said it's for the altenator.....well the top pulley and the 4 pulley's below just hit each other.....so I guess the real question is.....is the 3 pulley setup the one we need???? he thinks the 4 pulley setup is from a New Yorker or something similar.....AND....Does anybody have the 3 pulley assembly for sale?? Thanks...Anyone have some good pics?? I don't have a pic yet of what he has yet......Thanks again for any help....Tony