Toolman! I stand corrected. I thought the clips for the wiring harness was the same on 65 and 66 but you are right. Are the ignition cable holder the same for 65 and 66 too? You know the ones that goes around the cable and mounts to the aluminium fins.
I believe the fins are all the same. @CudaChick1968 can chime in. The spark plug wire insulators are the same for 65 and 66 and of course the 67's are double wire holders.