I have a non-Emission carb on my '75 F engine.  oes anyone know the correct jets sizes for the primary & secondry stages, that go at the bottom of the float bowl? The aftermarket kit I bought has a selection of 6 jets, ranging from #80 to #220. Secondly, the engine has a nasty flat-spot, just after idle. My first thought was the accel. pump seals, but the problem remains even after replacing them. ???