You've got the best possible combination already, including the Carter YF. What's "oddball" about a carb specifically designed to solve the problems the Rochester B created? Unless you make your own manifolds and use tiny carburetors designed for a motorcycle, three carbs is two too many. If you simply must have the Corvette 3-carb setup, I hope you're independently wealthy- - - - -a good-working setup like that will set you back thousands of dollars, and then you'll discover it won't fit a truck engine compartment without a lot of modifications. Aftermarket 3-carb setups are also hard to fit, but if you make the two outboard carbs non-functioning dummies you can impress the rubes who don't know any better and still get good performance from an original-equipment center carb.
Get a correct rebuild kit from Jon (Carb King) and put the YF in good running condition, and don't even consider screwing up a good fuel system just because you like eye candy. Very few multi-carb setups work well, and even the ones that don't give constant trouble usually result in less power and torque than a good single carb system.
Jerry