Carter AVS questions

Sorry about the hijack ,just curious, is your car an automatic and is that the original carb? My 69 340 has the original carb A9 4611SA and is a 4 speed. I had a discussion with someone who has a 4611S and he said that was the 4 speed carb. Not sure what the A stands for.

I understand the A suffix at the end of the model number means it has been updated somewhat from the 4611. The next update would be 4611B.