After several months of no carby misbehavior, now it floods out at idle and spills fuel down the accelerator pump linkage. Float level is OK as well as drop. Power piston looks great and is free. Ball checks and needle valve appear good too. Seems like too much fuel is being delivered. Could the fuel pump be the problem / too strong for the needle check valve? Vacuum line stopped up? This is a Rochester B - I know - I know. :-) BW