I have tryed a couple of different things and found out that .060" and hard driving can blue and burn the adjusters on ERSON rockers. Running .080" is the safe number and also suppling enough
oil to cool the valve springs. I ran .060" with a flat tappet lifter and stock adjustable rocker with oiling in the push rods and had no oiling problem. Did break to shaft with running a 501-533" camshaft. Adding an adjustable low oiling light or kill switch to the car would be the better idea to protecting the motor. The adding of my accusump also extended my motors life when I broke the shaft and the lifters came out of the bores (2). I do also run a HVHP
oil pump with 100# spring, this is old racing school. At the price to build, repair, and have these motors machined, running .080" is just adding to the safety margin of running these FE motors. Rick L. Ps IMO this is for both street cars and track cars.