I can tell you I never had any issues with my .640 lift roller on the street....My .730 lift was another story though...Keep it under .700. I prefer in the .650 range...
Hey Dragula - what springs are you running ie seat/on the nose OD, inst height etc ?
Thanx
Mine are for the long valve Indy Hemi heads Pacalloy, and they had a bit of seat pressure. If you really need to know, I can dig the info up...