Thanks for the quick response, guys.
Hope I don't find "machine shop" kind of damage tomorrow.
Picked up a '59 261 "supposedly covered after it was removed and previously running motor" as a backup plan. Unfortunately, upon draining the oil after getting it unloaded at the shop, we got some water out of the crankcase before the oil. Just hoping to get something back in the '55 before the driving season is over.