Fresh from the overhaul shop with 8130s, I have the entire bottom end of a narrow deck O-320. Hollow crank, conical mount, short stud for a 150 HP build. No cylinders, obviously. Tappets included but they weren't overhauled since the shop's machine for tappet faces was down. Otherwise, everything you need.

The crank measured at M010 on the mains, M006 on the rods.

Asking $10,000.

Pending

Sold.