Not as simple as I thought. I got these instructions with a RTE IVR3 solid state voltage limiter. So you need their limiter, or a constant 5V source and the pictured resistor to read full scale.
https://rt-eng.com/index.php/RTE_limiter.html
4 7/32 ID is the right size for early AFB's. I might have an original base, will check tomorrow. Or you can find a standard base and cut the outer diameter to the filter pad. That 4 7/32 ID is used on most AFB's up to 1967 and larger 2 barrel carbs on big blocks.
Complete 273 minus intake manifold, exhaust manifolds, distributor, and solid rocker gear. Ran very well, double roller timing set and recent valve job on a set of 675 heads. Just getting ready to swap in a 57 Desoto 341 Hemi.
I'd pull the valve covers and check the head castings numbers you have on the car first. I have an extra set of 65 Commando covers and an air cleaner. What transmission are you running?
I do not have any extra, but you only need the 340/360 special main bolts, no washers, and the tray bolts with the integral washers, they are still available. Evidently there were also 318 windage tray main cap bolts but they would be shorter.