Picked this up with a bunch of other hd parts, but I am unable to identify which carb this is. Would love some help. Thanks!

I believe the letter/number not shown is E.

 

It's simply a CV Harley, 40mm.

You need to remove the bowl and look at the gasket and float to determine whether it's an early version. It has an accelerator pump, so it's not the early Sportster model.

The bracket(s) on the top and right side are not original.

 

That air cleaner is killing any horsepower that might exist. +1 on the cable brackets, looks homemade.