My GTO ragtop has its original convertible rear power antenna, when I added a power antenna to my 69 LeMans ragtop I found a 69 hardtop unit. I ordered the upper bezel, gasket and nut repro and installed the unit.
The only parts that are different that I could see is the upper adapter (below the quarter panel hole, the bezel (the chrome tapered bezel between the body and the chromed nut).
Once installed you'd never notice any difference between the two and they are both water tight.
The only difference in the installation is that when mounting the unit in a ragtop the whole assembly is cocked 90 degrees different (I believe clockwise viewed from above) from a hardtop. I had to unscrew the adapter that bolts with three screws to the top of the antenna body tube. I left it unscrewed, installed the antenna, turned the adapter till it seated nice marked the a hole then re-drilled the tube and reinstalled the screws.
I wouldn't pay more and/or wait forever to find a convertible unit. The hardtop unit works and looks perfect.
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My Break Away Squad
1969 Fbird (base OHC, 350, 400HO & Sprint Cvt’s - 400HO & TA ht’s)
1969 Custom S 2dr ht
1969 LeMans (2dr & 4dr ht & Cvt)
1969 LeMans Safari wagon
1969 GTO (2 Cvt, 2 ht & Judge ht)
1969 Cat (3 Cvt’s & a 2dr ht)
1969 Ventura wagon 2 seat
1969 Exec 4dr post
1969 2 Bonnie Cvt's & 2 wagons
1969 Bonnie Brougham (4dr ht & Cvt)
1969 Grand Prix 2 SJ’s
1969 2+2 2dr ht (Canadian)
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