As I said earlier, I can easily be wrong. Listed in my '66 shop manual under exhaust of all things, is the air pump that looks just like yours. I can't swear that other years don't look the same, but the picture on page 12-17 looks like the one you have. Find a '66 shop manual and check it out. Sorry for the earlier confusion. I think it must have been a California version.
Rev
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'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.
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