I know there's a lot of debate on this topic as to whether or not it's even worth it. I have a question about the diagram though for anyone who's done it.
Hole 'C' is where the oil returns to the oil Gallery. They say to drill hole D for a pressure gauge. I'm a little confused, since both those holes would be in the same rail, and if that's where the oil returns, then how would there be pressure in that oil gallery for a pressure gauge? Probably a stupid question, I just can't wrap my head around it. I kind of figure oil pressure should come where the oil comes out of. But again, maybe somebody can explain it to me simply. Thank you in advance. Here's the link to the website for inliners:
http://www.inliners.org/tech/fullflow2.html
