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DADS1971 · 07-15-2013, 07:02 PM

The switch is for the TCS system used in 1971-72. It disabled the vacuum advance in all gears except high gear. You can leave it in place unused, or remove ad plug it. That hole is the third gear pressure port.

07-15-2013, 07:02 PM	#11
DADS1971 Registered User Join Date: Apr 2010 Location: Ponchatoula,La. Posts: 16	Re: Reverse lamp switch The switch is for the TCS system used in 1971-72. It disabled the vacuum advance in all gears except high gear. You can leave it in place unused, or remove ad plug it. That hole is the third gear pressure port.