If any of you other '36 guys are interersted I think I have found a main jet/metering rod combination for a 420S (1939-40 W-1) that my bone stock '36 engine likes quite well. There are probably other combinations that would give similar results but my collection of W-1 rods and jets is limited, unlike the "Strip Kit" that I have for AFB/Edelbrock carbs.

Until I hit on this combination I thought I was going to have to make some metering rods, definitely doable but not a quick project.