I'm not carb expert much less a TQ expert. Did you take a good look at your accelerator pump? Is it squirting too much fuel? Other than that, is the spread bore to square bore adapter a choking point? Specificly what intake manifold are you using?
YES, the accelerator pump setting is good, as in: per the OEM specs, so no higher, no lower than what is the be expected.
I will say this, the 'pig rich' AFR I'm talking about is not just a spike, it continues until I let off the pedal...so there is a very real fuel feed issue, or lack of air feed.
Regarding the intake manifold: so with my previous motor (which was a 360) I ran both the Performer RPM (dual) as well as the Strip Dominator (single) intakes, which both required the adapter plate. In both cases the idle=>WOT AFR rations were within the range I was expecting to see. In fact I was able to tune things very well at that point in time.
Now my W2 stroker motor is using the Edelbrock 2920 W2 single plane intake.