The gauge issue is dependent on the year SS. The wiring harnesses are identified in the shop and specification manuals that can be purchased for each year of Chevelle. I recommend buying both if you are intending to do a frame off. Be warned, the factory specifications are not exactly accurate in some details. (As an example: factory drawings for 69 front suspension have a couple of changes that do not match production.)
Redrum (or Mike)
68 Corvette - 383 CI 427 HP
69 SS Chevelle being updated to Pro-Touring
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