You can replace the 4 speed with a 3 speed, but you'll have to get the shift linkage that goes from the tranny to the shift box, the shift box and the shifter that mounts to the steering column and attaches to the shift box. You may need to change out the steering coulum if it doesn't have the tapped holes for the screws that are needed to attach the shifter to the column (unless you drill and tap 2 holes). Also, you'll need to fill in the floor where the 4 speed shifter was.
Last edited by Cablesmill; 05/28/2017 6:19 AM. Reason: Correct the mispelled word my happy fingers made when I wasn't looking.