Bruce, I have a 300-K with a single Carter AFB 4bbl and it has a 10 or 12" dia air filter. I didn't think that in '64 they had the crankcase breather hooked to the air filter until '65. Someone may have replaced the old air filter assembly with a newer type to hook to the crankcase beather to get rid of the smoke and slobber. Crash 300-K convert [Non-text portions of this message have been removed]