I have an original big block pulley, the offset looks good. The pulley looks like it is leaning out at the outside and in on the inside. The pulley runs straight and true. I have a reproduction bracket from CPP and the pivot bracket. This set-up uses the remote reservoir pump. The bracket has a hole for the frount bolt and a slot for the rear stud. I had the pull the stud up out of the slot to get the pulley to run closer to the correct plane.