Two barrel carb upgrade

Many of my mazda/courier truck guys use this style carb, they all love it once you get it dialed in. Webers are highly adaptable but the nomenclature is foreign to msny of us here, as we are used to jets and power valves, not venturi size or emulsion tube size, or power jet or idle jet or pump bleed or all that other VW terminology. Can get them off pintos. Bobcats and mustang 2's. That 38 migjt be a little small, but 2 would work great. Its all in the venturi size.