I noticed your carb has a hose tail rather than the tube fitting, the Edelbrock fitting (adapter inverted flair part# 8090), in the carb you are using now will fit & work fine.

It is not identical but it fits & should do the trick, like the Carter fitting the Edelbrock one has a 3/4" hex although it is a bit (.177") longer, brass rather than steel (different colour) & is not counter bored for the factory style mesh filter although this could be easily done with a standard drill in a lathe or drillpress if required.

The carb looks quite tidy, how do the jets, rods, springs, pistons & throttle shafts look?