That engine in the link has the bolt holes present for mounting a starter. Probably has the flywheel too, I would imagine.
If your brave you could always torch the aluminum off. Alot of heat real fast, so the journal doesn't heat up much -- aluminum will curl right off.
Probably failed due to fatigue. I swear they manufacture the con-rods out of bamboo...
If it overheated you'd have had the piston swell & scuff the cylinder, along with sludge-like burnt oil everywhere - especially in the valve cover area.
It's always easier to replace the whole motor. If it were me, I'd buy the new motor & get it back to the owner & get my cash, then rebuild the old engine & throw it on Ebay or Craiglist, depending on the market. Always nice getting paid twice!