so you have an alum indy maxx water block and you have safely drilled the oil returns with no water jacket issues? that is what I want to do
Lets be sure which oil hole that are being referred to:the ones in the lifter valley or the ones at the lower corners of the heads.The ones in the heads have a offset to align up causing a slight restriction.make sure that these hole are free from any silicone and gasket interference.
