Retune my entire carb after installing new heads?

DrCharles said
Idle and transfer contribution is a small part of the total fuel flow when all the main jets, especially the big secondary ones, are flowing...

You still don't get it because its all about combustion and nothing to do with airflow. It can take literally seconds for a cylinder to recover its ability to fire correctly when you have misfires and partial fires. The idle and transfer are the MOST important part BECAUSE they set the condition in the cylinder to take WOT correctly.

DrCharles said
but not surprised that it was too small at the eighth and, as they estimate, would still be too small at the quarter giving up 14 hp on this particular combo.

Yeah and that 1050 Dominator made 20 more HP on the dyno but ETed slower than the 750......