Good morning I have a 12A Bridgeport with a Holley 600 double pumper. I been trying to ser the carb but still not getting the full potencial of it. Can anyone help me with pointers, the correct jets and power valve.

 

If it is not a Racing Beat modified carb, you need to do a lot more work to the carb than just moving jets around. 90% of the things that need to be tuned when tuning a carb are fixed in place for Holleys.