There are only so many variations a lock cylinder length will allow. Short cylinders have fewer variations while longer ones have more. Don't hold my feet to the fire over this but at one time I was told that GM had 13 variations. So out of every 14 vehicles off the line the key would match one of the prior 13. That was a big reason that the doors and trunk keys were different from the ignition keys. Gave more variations. Odds of 2 vehicles matching both doors and ignition was less. That was a big reason they started going to chipped keys because with a computer code embedded even if the keys fits making run was another thing all together. Sure the early systems like that would start and run for a very short time, then would shut down as owners had chips start going bad found out. Now look at the new ones today? Keyless???
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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