[RET_COP]

The problem is there are so many variables that come into play. Head manufactures have different valve angles, stud locations, stud angles, valve tip heights are changing, and no standards in the industry. It really has to be looked at so you can minimize guide wear, stud flex, correct lobe information getting transferred to the valve which effects lift and area under the curve. It's overlooked too often. I was compromising between perfect geometry at the valve tip (90*) with a small pattern and the rocker tip location (which was always too far outboard on the vale tip). I could never get it all correct and everyone said you have to compromise, but it bothered me and I looked for answers. I never thought of the the importance of getting the pushrod side correct until Paul explained it all to me.