What say you, early A experts?

Fender tag is going to be the key for the knowing exactly what you got. If the Fender tag has a 30 then its a 2 barrel car. If its a 31 it a four barrel car. This number will be under the AB line in the tag. Formula S could be determined by seeing if its got a tach in the dash. I once bought what I thought was a 2 barrel 65. Turned out it was a 65 formula s that someone not only converted to 2 barrel but also automatic from a 4 speed. Has the large hole in the dash that was filled with an a/m tach. I took a spare formula s tach I have and it fit perfectly. Here is a link that would explain some more info
1965 Mopar Fendertag codes