Which wide band are you using? They can be very good reference tools, but sometimes lead you a stray with tuning if you are glued to the readings.

From my experience.
For idle, aim for 13.5
Cruise 12.75-13
WO throttle 12.5

These chambers are very lazy and seem to like fuel.

Does your carb have a secondary PV?

Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
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