Recently I bought a running driving 1950 Chevy 3100 4-speed with a 235 engine. The engine has 1957 stamped on it so apparently it isn't the original. After I drive the truck I notice there is some motor oil on top of the fuel pump. No leaks from the valve covers, etc. Thought it might be from the road draft tube, so I removed it, burned all the carbon out of it, repainted it, reinstalled it & even put a piece of hose on the end to lower it into the draft under the vehicle. Still get the oil? Noticed that it has the fuel pump with the additional vacuum booster on the bottom and has a cork gasket in it. Could the oil be "blowing" past (thru) the cork & collecting on top of the fuel pump due to the additional vacuum plus the engine pressure? Anyone ever run into this situation that has suggestions to remedy it?