Need help with edelbrock 1406 carb

Uhhhhh. Yes & no if you are referring to the AFB/AVS models. Edel copied the the Carter & many parts are interchangeable. You could swap the top of the #1406 Edel carb mentioned in this thread with a Carter #96XX carb, & both will work as they did before.
There were changes in the boosters, but they can be swapped between Edel & Carter bodies.
The only area I am aware of that Edel changed was the acc pump. The inlet valve used on the Carter was eliminated.