Engine out, strip for inspection down to the last nut and bolt. It is the only way to determine the extent of the damage, but no oil I would expect fucked crank, fucked pistons/bore, head+ cams will prob be scrap due to pick-up, oil pump scrap, to be honest I will be amazed if there is much usable from the internals bar maybe the block with a re-bore and the crank with a grind...