⭕ 1947 Knucklehead Engine
1947 EL 5 digit seral number which means it is a late 47. I would almost bet that the engine is a 74. It has had a Panhead barrel conversion which was very common in the early 70s. This engine is complete from oil pump to carburator. I have a Ca. pink slip from the early 70s from the owner I obtained it from. He has had this engine for over 40 years. The left case is 1947 & the right case is 1941. The engine turns over & stops.