[J Persons]

If you have an extra hydraulic lifter, disassemble it, clean it in carb cleaner and fill it with epoxy, then re assemble. It will act as a solid lifter for checking purposes. No worries about the lifter collapsing under spring pressure or anything. Just be sure and don't install it in the engine during final assembly.

If you have stud mounted rockers and hydraulic lifters, you can gain 200 to 300 more RPM if you adjust the lash so that it's at 0, then lock it down. This will put the lifter plunger at the top of its travel, and will prevent lifter pump up at high RPM. Adjust the valves at operating temp. Trade off is they can sometimes be noisy.