no idea on fuel pressure, no way to tell either. i do know its running a mechanical 340 high volume pump and i think -6 AN fittings and line. it ran fine last year until the motor went down due to oiling issue. it had a different carb and was mostly stock though. sorry i dont have more info
do you think a high float level mess with anything to cause my issue? they can be adjusted right on top of the bowls correct?