Ferris, I did a little web searching and came across this link from Summit Racing for the 1964 Chevy C10 Antenna installation instructions. Should be virtually identical to your '66 install so maybe this info will clear up where and how it gets installed. It should also help confirm if the antenna you have will fit or not I think. Let us know how it turns out.


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)