This is the motor and pan. The motor isn't an 8ba. The pan looks like a truck.
Here's the numbers on the block. Kinda blurry, but reads, Star,799A-I603225, Star. Like you said, a mix match of parts I guess. Funny though, the bore is still 3 3/16 and no ridge at the top at all, so this thing didn't get much use in it's day. Not a crack in it either.