Re: Roller or flat tappet
I've been running a large solid roller on the street for the last 5 years without any problems. The specs for my cam are in my sig. For about 4 of the last 5 years I drove the car every day. During that time I would check the lash every 3-4 months and only have to adjust 1 or 2 rockers each time. Make sure your valvetrain geometry is absolutely correct and you should not have a problem. I would also replace my bronze distributor gear once a year.
In addition to checking the lash and replacing the distributor gear you will need to keep track of which valves required adjustment so you can spot a lifter as it starts to go bad. You will also need to check your rockers and valve spring tension periodically. I would also suggest going with heavy duty coated cam bearings. Because of the high spring pressures I did have to replace all of my lifters, rocker arms, springs and cam bearings this summer. No failures, they were just shot.
Solid rollers make excellent power but they are more expensive and they do require more maintenance. Would you consider this much maintenance good or bad?
'69 Camaro - 429 SBC Dart Iron Eagle 9.325" block, Crower crank, Crower 6" billet rods, Ross pistons (10:1), Total Seal rings, AFR 245 heads, T&D steel body shaft rockers, Cloyes Timing set, custom ground 4-7 swap solid roller 274/286 @ .050" with .704" lift, Dart single plane, Holley Dominator EFI on E85, Injector Dynamics ID2000 Injectors, Stef's #1705R oil pan, F2 Procharger, Lemons 2" primary 4" collector, ATI 9" blower converter