To the best of my knowledge, all 64-65 "A" bodies used the under dash "knee knocker" A/C. 1966 being the first year for the integral A/C and heat unit. I would have to check, and see if a 67 or newer evap would be the same as a 66. Years ago I had a source for a company that would rebuild/repair obsolete evaps. After the holidays I will see if they are still doing this.