Do the '64s have a threaded boss in the roof structure like the '66s do? If so, I highly recommend the 3-point retractable belts from Morris Classic Concepts. I put them in my '66 and they are fantastic.
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1966 Pontiac GTO (
restoration thread)
1998 BMW 328is (
track rat)
2023 Subaru Crosstrek Limited (
daily)
View my photos: Caught in the Wild