what is the file name and addy of the most recent file you want me to look at.?
The one with the 600 carbs on the motor.
what is the defect on the 750 carb? If it is a real manufacturers defect like a casting flaw/Edelbrock may replace it for you.
But you have to ask.
Open up the AFR text file and edit it by writting in showing aprox throttle position/engine load/driving mode/rpm
In each area so I know what the engine is doing.
post the AFR file txt here.
That is the easy way for me to evaluate it.