I have a ’53 Ford Jubilee and I’m having a lot of trouble with the distributor system. The tractor suddenly stopped running and I then replaced the coil, rotor, points, and condenser. Still wouldn’t start. I used an emery board to sand the points down so they would make good contact and then the tractor started. It was running a little rough so I loosened the bolts holding the distributor in place and tried to adjust the roughness out. I found a distributor position where the tractor ran great. It would run great for about 5 minutes then it began running so rough it almost died several times. It would then run great for about 5 minutes then start running very rough again. I pulled the choke to see if it was starving for gas, no change when I pulled the choke. I tried rotating the distributor again without any success. It did seem when the tractor was running great, I would tighten the 2 bolts holding the distributor in place and the tractor would begin running rough again. Sometimes I could loosen the bolts and the tractor would smooth out a bit. Any ideas? What can I do? Thanks a lot.