The 65 10's and the 66's were different? I got some 10's on the floor right now and they are not finned. As far as I know they are stock "S" brakes. The 9-10 spindle is different but I dont know how, The Scarebird disk conversion calls out 9 inch spindles. The original 65 mounts are thick rubber,like 3 inches on the original brackets. The newer biscuit mounts are much thinner, like 1.25" total. Dont know if the brackets changed to a shorter one in the 67 or what, but the motor might sit lower with the post 66 mount setup.
