Aftermarket main caps??? why bother??? you plan to race it flat out at 6500 rpm ++ roundy round at 5500 rpm+ for long times??All the aftermarket billet mains I can find say that you need to align bore. This is not a positive development.
Cloyes makes the part I need 3145-5 or 3145-15
For a change of .005 or .015.