Pushrod oiling - do I need it?

The bolt centers itself at the head with a taper in the shank.

That doesn’t sound right. I thought the dowel pins located the head and gasket. If that’s the case, the bolts or studs location will be based on where the dowel pins are actually located compared to the blueprint and where the bolt holes were drilled in the head and where the threads locate the fastener in the block. It would seem the bolt is just where it is.