I want to go with the 1.6 full roller rocker. I have in the motor right now a 465/488 summit cam. and I want to bump it up some. I heard somewhere that I should not use 1.6 rockers with a hyd. flat tappet cam. I have RPM Heads good to 575 lift. What do you all think. I want to order tomorrow. Thanks in advace for any help. I had a 488/510 summit cam in the motor before and like the way it ran better then now.