finally got my 360 engine block from the machine shop. now, i have performed most of the oil mods (drilled oil feeds from right oil galley to mains to 9/32 and large feeds to 1/2 from sump to right galley). did not do the crossover tube in the valley. planned on plugging the left galley at #1 main per mod directions. my machinest says not to plug off, but drill a .090 hole in the plug to oil lifters. i do want enough oil on the lifter roller bearings, but now i'm unsure what to do. plug it or put a hole in plug?