Sitting 50 years, that "newly" rebuilt motor is gonna need ANOTHER rebuild before you can even think about cranking it.
I don't claim to know much about old engines but it seems like it was missing a few things.... most obviously an air cleaner assembly (unless it was located elsewhere).
__________________ My bus - Jasmine - External Build Website - YouTube Channel - TN/KY Meetup Group
As a level 1 burglar, Bilbo got a pony when he accompanied the level 60 dwarves on the Smaug the Dragon raid. Those powerlevelers probably invited him solely so he could trigger fellowship attacks for them.