Yes you should abandon that original Salsbury drive clutch that came stock on your '86. It's a bad design and upgrading to the 1988+ drive clutch would be highly recommended. It's a direct swap. No modification needed.
You don't have to find an original clutch and pay several hundred bucks to replace yours. You can order a 1997+ drive clutch and it will fit right on your 1986 motor. I have a 1990 cart (same exact motor) and just upgraded my clutch a few weeks ago. Check out the video and read my description below the video for more details: