I am not a Ford fan. That said I have a 8N ford tractor 1949 era. front distributor. two weeks ago while I was cutting grass it quit. It just slowed down and died. I knew the carb was bad and needed rebuild. So I rebuilt the carb cleaned all the filters and changed the plugs. NO go. Changed points ,cap, rotor, codensor, no start. Ran comp.test 110 all 4. Found a 'N' forum after being "disted" for not know what was wrong with my tractor and a bit of nail biting on my part one guy answered one of my questions. That seemed to break the ice. Lots of tips..the main one and the culpriet of all "Do you have good spark" Well the plugs gap at .025 lots of spark??? He asked will it jump a 1/4" gap. I opened a plug as far as it would go (not a 1/4") it worked. He sugested I get a spark tester,Now I've been working on cars 50+ years and never used one of these... I bought one. No it would not jump 1/4". When I did the yearly tune up in the spring I changed fron 6volt to 12 volt and changed the coil. I figured the coil should be good...NOPE.. bought a new coil and I pulled off #4 plug wire and put the spark tester on the lead. Hit the start button to see if it would jump the gap and it not only jumped the 1/4" gap but the engine started runing on 3 cylinders. Guess your never to old to learn. OH yeah I cut grass this afternoon.