The easiest way is to flip the carb over, with the bowl off. Bend the little tab on the float where it sits on the needle. The float should be level when upside down. (That is the position that closes the needle and stops the fuel flow.)
With the carb upside down:
If the float drops past level, toward the top of the carb, then the fuel level will be too high. That will cause flooding.
If the float sits "high" on the needle, then the fuel level will be too low when installed. Low fuel level can cause stumbling or hesitation on hills.
If you don't want to pull the carb to flip it over, you can pull the bowl, and gently lift the float until it closes the needle valve. The top of the float should be level.
High or low float level can cause sputtering. If you want to send a picture, I might be able to help more.
Gunny1 wrote:Big block,
I can say that it was not doing this before the change. The fuel pump is recently lnstalled NOS. I will check vent lines, but if it is the float, im guessing the arm would have to be bent slightly either up or down within the bowl?
(7 of the 10 voices in my head are screaming "Floor It!")
M422 #182, #1265
M422A1 #1673, #1788, #1843, #1846, #1957, #2260, #2883, #3284, #3743