Oil pump install with ARP main bolt?
As for my decision - All my engines get align honed. Once a cao is torqued with a stud, the cap deforms differently from a bolt because as Johnny said - they clamp differently. Then the bore is honed to size. When you loosen the fastener, the cap and block distort. If you don't use the same fastener to put it together as what it was machined with, when you do bolt it back together it is very possible the bore will not be the right shape or dimension. So I just found a way to make the same stud work. No cutting on the cap or heavy clearancing on the pump body. It will be a problem on mains 1 through 4, but 5 is a lot thicker and has more contact area witht he block. So it's possible it fine. I've never checked myself....lol.