The grooved pushrod ball should fix the air lock problem. Whenever the engine stops, some of the valves will be open, and those lifters will bleed down due to the constant pressure of the valve spring. If the lifter is functioning properly, it will refill within a very few turns of the camshaft, as long as the oil pressure is sufficient. Noisy hydraulic lifters are usually the very first symptom of low oil pressure.

The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!