Mike, I've got a few random questions I hope you don't mind answering...

Is this one going to go back together with a secondary metering plate or are you going to go with a metering block conversion and are any of the mods specific to that plan? On that same tip... do you think any of those secondary metering plates with provisions for actual jets would work on these 4180's? https://www.summitracing.com/parts/QFT-34-2/

Also, in your initial mapping, the bore size and venturi size are listed; how (what tool) and at what point (the physical spot) do you measure the venturi size?

How about measuring the transfer slots; is that done simply with calipers?

I'm guessing you're going to keep the annular boosters in the primaries; what differences in tuning do you expect you'll encounter with the annular's vs a different type?

Also, are you going to add a idle speed adjustment screw so the need for a solenoid (or something else) as a throttle stop is eliminated, like the truck carbs have?