Manton didn't do retrictions less than .040, so i should have checked around before sending them out. I didn't look at the oil going by the lifters. But by the looks of how much is coming out of the pushrods, it is probably plenty. I never thought that a .062 hole in each lifter bore bushing would be a bad deal, since a stock block is often raced with huge holes to the oil galley. If 55 to 60 psi in the traps at 7500 rpm, i'll run it and data log it to compare readings to the gauge.