Without question I 100% agree that optimizing your valve train geometry is going to help. I myself opted away from some roller rockers I have to some 273 rockers because the rollers were trying to roll off the end of the valve stem. Now do I want to stack up offset shims or unbolt and disassemble my heads to have them machined? No not really for a daily driver. If it was a drag race effort and not just a bracket car that needed consistency I would be all over getting my geometry maximized...