These trucks have been starting on 6 volts for many years. Putting 12 volts to that starter may get the truck to spin but when you put the truck back to 6 volts you still have the problem.

If you fix the problem in the first place, then you avoid having to go back and fix the problem..

Bill M
53 GMC Hydra-Matic

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When you argue with a fool, two fools are arguing..