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#3
01-13-2019, 01:42 AM
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Lawrence, I would bet that the TCS switches work the same across lines. The reason I mention it is 1970 & 1972 Corvette with auto and 4 speed also uses a vacuum solenoid, I know that it operates in 3rd and 4th on the manual, don't remember about the auto operations - but there are extensive threads on the NCRS forums regarding them -due to operations judging.
I let a local NCRS member borrow my 70-72 Judging guide or I would tell you when it operates. On my LT1 it blocks vacuum advance in 3rd and 4th when the accelerator is not depressed... basically in a high speed coasting situation.
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~JAG~ NCRS#65120 68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car #21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built. 71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist. NUMEROUS Lemans blue Camaros, Monza Red and Daytona Yellow Corvettes & a Chevelle or two... Survivors, restored cars, & other photos https://picasaweb.google.com/lh/myphotos 
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