Hello Stanton. Thanks for your comments.

I am sending you a CAD drawing that shows you the 66233E lifter installed. I sent this to Crower.

The period of time that the oil galley is exposed is not at high lift, but for a period of (.138-.023) .115 inches of lift. This is quite a bit, IMO. When I think about 16 lifters, the loss of oil pressure, and pumping all that oil out of the pan and into the valley, it scares me.