apparently there is a guy on the XLF who can help do the opposite.
remove the starter hump from a humped case and allow older oval primary cover placement.
I don't get the XLforum comment?
Anyway, not quiet as easy as using a starter hump off a set of cases, welding and machining,That doesn't sound all that easy to me.
You'll need a different mainshaft, clutchgear, clutch rods, clutch basket, clutch hub, sprocket cover, all the starter stuff, ect.
I still say, I doubt its ever been done, no reason to, when the XLH cases allow for a starter.
It would be sacrilegious now a days to wreck a good set of early cases.