proform roller rockers

Dude dont do it!!!!! i bought a set of them about 6 years ago & when i was rebuilding my 340 @ that time while i was degreeing in my cam i found i was down anywhere for .008-.015 of an inch in lift from where it shoulda been!!!! moral of story ther worse that factoy hard where for being a true 1.5 raito. the cam lobes were nuts on @ .363 so with my mock up solids it shoulda been .544 @ the valve it wasnt until i ponyed up for a set of comp cams pro magnums. ran a s#$@ load better & seemed to have alot more bottom end.:wack: