The real reason I am looking at roller rockers is that with the new larger size valves I did not realize that the valve tip on the intake valve is shorter than the exhaust and causes a clearance problem with the rail type rockers which the manual states require atleast a 1/16 gap between the rocker and spring assy. The exhaust valves rocker to spring assy clearance is fine as it should be because everything is new including the rockers. So that is wht I am leaning towards the rooler rockers for a remedy unless the is another way to fix my clearance problem.....................Rich