goldhawk

I am trying to remove old broken antenna on my 1963 avanti with a new electric antenna replacement. I can't seem to remove the old one, the top nut just keeps spinning and spinning. I'm not sure if there is a hidden nut on the bottom, inside the antenna cavity in the trunk that I need to grasp. I can't see up there to see if a nut is spinning. Anyone had this problem of removing an old antenna?

Just need to know if there is a hidden nut up inside the trunk area where the antenna comes down. The top nut just keeps spinning and spinning, and only have about an 1/8" opening between the outer car body and the antenna base. Anybody know if there is a nut down under?

Need help in removing rear antenna on a 1963 avanti. I am able to turn the outside antenna nut, and it came up about an 1/8", it just keeps turning and nothing happens. Is their a nut on the underside? I am unable to see up inside the hole for a possible nut. Anybody run into this?