Simply pull off the Red Nail bracket if it still exists and slide this adapter over the pin and place the #2305-0029 timing pointer on top and lock it down with a 1/4-20 bolt and you are ready for action.
Bracket is machined for a 3/16" locating pin and one 1/4" bolt hole. Adapter is black anodized and is .300" thick to get the proper timing pointer depth.
Picture four shows the newer type timing pointer with the adapter to give the racer an idea of how it works.