Thermoquad id

Can anybody please help me identify a Thermoquad No 6-2141? I don't see it listed in a chart of Thermoquad nos. I found. I have a 71 340 and am looking for an 800 cfm carb. Also whether it is listed as manual or automatic. I have a 4 speed. Does anybody know what the difference in the carbs are between an automatic and a stick? If it turns out to be an automatic carb, will it work on a 4 speed.

Thanks