Moper, I think you are totally misreading what I am writing. We are not against these heads. We are a dealer for INDY and RHS and we want to sell these heads! We are just trying to put as much info out there as possible. We have talked to INDY and RHS about this spring height issue and they both know it is a problem. The problem with a longer valve is, exactly as someone said, the rocker geometry gets way out of whack. When this problem gets fixed this will be our small block iron head of choice. It flows great and has a great port design.
Kevin