Thanks for the comeback...1967 Rochester 'B' manual choke....There's a tiny circular screen in the 'support assy' I call it the pedestal,in the same tube, or cavity where the main jet screws into... There is an illustration of it, in the instruction sheet of the rebuild kit.... I believe the float set is correct as the bowl is 3/4 full when I take the top of the carb off....All the springs & balls are in the correct spots, as I did the rebuild while viewing the 'Mike carburetor vid'. Your comment regarding vacuum, and especially the air bleed holes at the cross over piece, is leading me to believe there might be a restriction in these area's...I had a friend of mine clean/soak the carb in an ultrasonic carburetor cleaner machine and perhaps some of the passages might still have debris. I double checked the gasket and confirmed that it wasn't restricting any holes.... What should the vacuum be coming off the engine? - I will check that as well.......
