Edlebrock Carb and Manifold Q's??

[TallGMC]

Hi All,
I am still fairly new to pretty much everything about these trucks. Fell in love with them and am jumping in head first!

I have an aftermarket edlebrock manifold with a 1406 edlebrock carb. My carb is shot and I had it rebuild but this time it just needs to be replaced. My newbie questions are the following:
-How do I know what carb will fit my manifold?
-How do I identify my exact manifold?
-If I buy a new 1406 will it bolt right up guarenteed? Or are there varients to the 1406?

Thanks for your help and input!