The 67 AIM L35 A11 only shows the sheet dated 11-30 as the release date and an update on 2-8-67 to the accelerator lever. Nothing is said about the throttle linkage changes.
If you look at the early 7027200 Q-jet for example, you can see the provisions for the nylon bushing but none for the 2 piece design, providing the throttle plate hasn't been changed. The later Q-jets that followed like the 2027211 show the hole that can accommodate the 2 piece throttle linkage that don't use the nylon bushing. If you try to use the 2 piece design rod with the nylon bushing it will not fit due to the machining size of the shaft is smaller. So, unless there is a more definite answer somewhere, if a poll is taken for 67 BB carb model number, car month build and linkage type, we will have a indication when the cut over took place.
My info is:
Car Date Carb Number Throttle
04B 7037210 (AT/AIR) 2 piece
05B 7027211 (MT) 2 piece