Custom pushrods, how much stock lifter preload?

72Dart6pack said

You have enough oil on the top end. Don't be pumping more up thru pushrod holes.

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I'm running external oil feed for the shaft rockers which I will be testing different restrictor sizes so there isn't too much oil up top. I actually grabbed some stock LA valve covers I'm going to cut the tops off of so I can watch the rockers while I prime the oil pump and turn the engine over by hand, then later watch again while the engine is running.

Here's a thread of my build for some background, it's definitely not your typical SBM "pick the parts and put it together" deal: Junkyard 5.9L Magnum + Edelbrock LA heads build