One of the tricks in converting forks to mid or Wide Glide is using the correct spacer for disc brake rotors. Chrome-plated billet aluminum.
Note
Sportster 78-86, FX Shovel 78-79, FXB Sturgis 80-82, FXE 80-84, FXEF 80-84, FXS 80-82, FXR/S 82-84, FXDG 83, FXRT 83-84, FXSB 83-84 , FXRSDG 84 , FX Model 85-87 (except 87 FXLR, 85 FXWG) with 35 mm mid glide Fork