So I had a piece of 2" diameter by 1/4" thick oilite bronze bushing left over from my steering column, and may have hit on a new way to keep my roller cam from walking. I cut it in half, drilled a 3/8" hole in it, and ran a 2" cap screw through it and the distributor bolt hole, 3/8" x 16 thread. I machined the cut end of the bushing so it's about .002" away from the cam gear, and will ride on the machined side of the gear itself, and not rub the chain. This turns the distributor hold down bolt into a stud. Add some threadlocker to the bolt, a lock nut to the top of the timing cover, and replace the distributor hold down bracket. What do you think? I was never excited about drilling a hole into the front of the timing cover and through the coolant passage, but will this effectively locate the cam? How much pressure does it make if it walks forward? These bushings are really stout, and designed to rub against steel. I couldn't get any pics through the fuel pump hole, but it looked great in there!