Better Performance Output

Backfiring through the carb is timing. That (not getting it exactly where it was before) is just par for the course when swapping intakes. A little less initial and it will smooth out and the whole curve will be back to where it was - or at least be closer.

There's no rods in the Holley design. If your interested in learning, the Urich books and Chrysler pamphlets I recommend at the end of the "Nothing to Compare" thread cover the basics.

Details for your QF will come from QF. It probably has the large see-through window rather than the small plug on the side of the bowl. If it does, starting point for fuel is generally in the middle. Very fine trimming can be done to fuel delivery by adjusting them slightly, but basically the factory setting is good.