Carter AFB

I just started to restore my 65 Barracuda Formula S. I pulled the carb and can't see any numbers for a rebuild kit. I took the top of the carb off as the Walker Rep said if I didn't see any outside to look there. The insides are dry and have alot of trash. Where should I find the numbers and I feel this is the original carb, should I stay with it or look for something else? I see some numbers that appear to be casting numbers. What type number am I looking for?
I've read the comments on the different aftermarket carbs and tend to stay with what I have, but am open to suggestions as you guys know a lot more than I do.
Advise Please.