We have been doing this mod for several years and for several engines. We have no oiling issues ever since. This is only needed to be done when using studs.
One other thing is the lifter bores. If the bores are worn and the lifters are loose in the bores you will lose oil pressure . at that point pushrod oiling won't do a dam thing. My son watches some of the builders on this site and said its a dam shame some of you believe their bullshit. The engines that leave this shop never have any oiling issues. Part of blueprinting an engine is making sure all the machining is accurate.
After some of the idiots condemned my suggestion on oiling tips that we used that work very well I thought I would see where this thread went. And just like I thought some of the best suggestions are dammed by many that don't have a clue.
No oil flow? Parts wear real fast. 6 years of racing the indy headed 340 and no wear at all