The accel pump lever has 2 holes. The inner gives a short shot. The outer gives a longer shot. Either may be correct depending on engine build.
Put a large inline filter between fuel pump and carb, and remove the one in the carb inlet.
The secondary "upper" air valve can be adjusted to open faster or slower(usually opens to fast). There's a set screw on outer right rear(under the shaft) to adjust spring tension. More tension slows the air flap opening.
Holley's have to many versions to give detailed advice. But usually it's float level and pump shot adjustments.
