I’ve been having trouble with these two stromberg 81 carburetors ever since their rebuild. I elected to install the check ball style valve to replace the stock float needles, as well as new matching set of 71 bypass jets and idle jets. The float adjustment is something that I always eye-balled and estimated somewhere below spec to avoid flooding. I finally decided to dive in and set the level precisely by observing actual fluid level. I’ve read that ideally there should be 1/2” - 5/16” margin between fuid level and top machined edge of the carb bowl while the motor was running. I invented this method of pressurizing fuel into the bowl while on my bench. Seems to have worked well, but please let me know if there is something wrong with doing it this way. Anxious to see how they perform!