The only fenders for a 66 Wildcat are from a 66 Wildcat. The vents on the side are Wildcat specific, and Electra fenders have the portholes. You could fill and drill if you found some excellent Electra fenders and are unable to locate Wildcats. Same for 65, though in 65 the Wildcats had large holes for the vents. While 65 and 66 are similar, they are different around the headlight opening.
