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#24963 02/24/2003 5:14 PM | Joined: Nov 2000 Posts: 119 Member | | Member Joined: Nov 2000 Posts: 119 | Marshall, you might want to check a factory shop manual, but I seem to remember that my '72 C-10 with a Saginaw 3-speed had a switch that prohibited vacuum advance unless the transmission was in high gear.
---> Bill | | |
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