For me its simple......price. I guess I am poor next to some of the guys on here. I sometimes wonder how so many people have the money they do to spend on the hot rod ? I wish I had more but alot of people like me have to live within our means. Thats why I went with EZ heads as I wanted to stay with stock rockers and stock exh port location. I know I am giving up hp but its a budget I can afford and I feel the EZ's are better then the Eddy RPM's and any iron head. Course my 63 is basically a street car that I love to race when I can afford too and I new mid to high 10's on pump was all I could afford. Ron