Retune my entire carb after installing new heads?

DrCharles said
I am not sure a fixed orifice is the best thing, because it may be too big at idle but still too small at wide-open...

I found my carb log with the most recent settings: (pri/sec)

IFR .028/.028
IAB .078/.079
TSR .074/.074
MAB (HSB) .026/.026
MJ #71/#86
PVCR .066
PV 7.5"

Tomorrow is supposed to be a nice day, hoping to get the Dart out and get a few AFR readings at low-speed, high-speed cruise, and a very brief WOT on all four barrels :eek:

Since the head swap, it's a little too lean at the start of the transfer slot (that small flat spot JUST off idle is now worse and leaner), but highway cruise at 60-65 mph is good and lean (15-15.5:1) without surging. I may need to open up my TSRs a little bit.

Depending on what WOT looks like, maybe go up two sizes on the secondary jets?

Hey @Mattax are you around? I've also posted on racingfuelsystems Holley forum :)

Not really around.
One change at time.
Since there is a flat spot, I'd start by either reducing the PIABs or opening the primary IFRs.

I don't see any reason to change the secondary jetting at this point. Hopefully the new heads are not pulling less air under full load, high rpm.
If you are worried they are, then jet up all four barrels equally. Take it to the dyno or the track as brief bursts are effected by dynamic responses. Plus the AFR numbers aren't meaningful unless there is a way to correlate them to changes in performance.