[chiphead]

Great questions. Is the oil metering to the pushrod a lot different between a HR lifter and a HFT lifter, for the same oil weight?

I know a HFT will put a LOT of oil up top on a Pontiac. Is all that oil flow needed to cool the valvesprings? Is it different when using the shields vs using a modern Viton seal? Seems like all that oil increases the chance of oil pulled past guides or valvecover oil leaks. Just on my stock type 400 with the valvecovers off, the oil will overflow the heads above idle. The guides are swimming in oil.

Is the point of restricting the pushrods to limit oil starvation in the pan? What about a case where you can keep the pick up covered with oil?