Crane pushrods and rocker arm.

Looking at the photo.. I don't see any threads out the bottom of the rocker. /scratch

I'd think the pushrods are too long... go a bit shorter as you want a few threads showing out the bottom and top correct?
The pushrod cup gets splash oiling from the orifice in the rocker, having the adjusters too far up into the rocker body is not good. Gotta find the sweet spot when setting the adjusters for thread exposure so the oil gets there, but no more than necessary. Using thread exposure as an “in general” setting is ok, but I’d be checking it all mocked up (with a measuring pushrod) to make sure the orifice is above the cup and adjust as needed to get it ideal and then order pushrods.