Spray from the front of the engine indicates a worn case-to-crankshaft fit. The front bearing does not make the seal. The seal is made by a close fit between the case and the crank forward of the carburetor. If a lot of raw fuel is spraying out, then you need a new case, crank, or both. Those parts would be problematic to get at this time, because the engine's been out of production for so long.