The carb only performs marginally better. The used metal pump piston fits too loosely to give a good jolt of fuel when depressed. I beat it up pretty badly when first disassembling the carb. The idling system is a little better but not much.

I installed a Rochester carb on it and the engine is running much better. Better idle and acceleration. I have multiple main metering jets that I can try in order to get the right balance between power and fuel economy for my altitude. For the time being, I'm going to run with the Rochester.

I appreciate the help with this. I need to find the balance between throwing additional time and money into this particular 228 carb or biding my time until the right 270 carb comes along. Dave

1946 Chevy pickup, 1948 Chevy suburban, 1950 Chevy pickup, 1952 GMC pickup, 1957 Chevy pickup, 1939 Chevy pickup