I may just be over stating the obvious, but please indulge me on the following.
My 1949 Jeepster’s VIN/Seial number starts with 4-63 and according to the KWAS catalog, this would be a 4 cylinder Jeepster, correct? As mine has a 6 cylinder, I am assuming that this is not the engine it was born with. See attached pictures.

16FDAB74-6A30-4926-99F9-93A3B6B48178.jpg
1649D3BF-982F-41DC-9C83-1C6BEF26B5D7.jpg