Chilton's shows a WT code for: 1967 V8-400 MT 4BBL 1970 V8-400 AT 2BBL 1971 V8-400 MT 3spd 4BBL Cross reference that with your VIN /date codes and that will give you a better idea of what you have there. If you haven't looked already, here is a good site to visit while looking up various info for that 68 of yours. Enjoy that car, its a beauty. http://1968firebird.org/illustrated/illindex.html for more info