Too much pressure??

I would be more inclined to blame the carb. I would consider a rebuild with a new needle and seat. Look in the bottom of the bowl- is there a lot of sediment? Maybe a new fuel filter is needed?
The carb has not been run since the rebuild & everything was gone over by a local professional 'old carb guy'. The pressure test was done on the rubber fuel line where I removed the fuel filter....no tee. I guess I could try lowering the float.....

Carter Carb.jpg

Fuel Pressure reading.jpg