pushrods with or without oiling hole?

Do not be over concerned about pushrod weight.

This is because the pushrod is on the slow moving side of the valve train. The effective increase in weight between the two pushrods may be small but provides a huge increase in valve train stability. Remember the valve side of this valve train is the critical side where any weight savings will make marked improvements. No matter what we change, valve train stability is the goal.


http://www.mantonpushrods.com/Pushrod-Info.html