Heres what I mean---you have 10 bolts----a dowel has to be in the cap and in the block--10X2 =20

When a block is made the caps are fitted to the register with an interferance fit for locating(sorta like dowelling?) then the block is align bored----------any effort to do any mod to that setup will require another align bore/hone to correct the bore to the possible relocating of the centerline by the mod.

As good as I am with doing things like that, the odds of some of those 20 places being exact grows beyond what is reasonable (and I do lots of main cap replacement,etc)

Furthermore, the main webs on that engine are sorta skinny and some extra stress around any fastener will be a source for a possible fracture up to the cam tunnel----a very slight outward force will almost guarantee a break up the oil passage to the main

Not trying to be an alarmist, or to cry WOLF, but in my opinion its something you don't want to do----------