Everything you need for correct installation is in the 67 AIM. Do not use 68-69 info as CC system installation was changed in 68.
Wiring was changed and firewall piercing was changed for new servo bracket. Vac. line routing hole piercing was also changed.
Get the 67 Chassis Service Manual for description of components and how they work. Get the books you will need them.
Your servo should have 2 vac. lines as servo is the same for all 3 years.