Carter AFB kits needed !

I have one of those on the Back in a 1406 Edelbrock on the front. I was kind of thinking are the metering rods the same? And just numbered and lettered different? Is there a crossover chart? Or are they completely different links and that's probably why my carburetors or so crazy?

Thank you for info
Im doing my research now before I end up buying a bunch of junk I will never use .