I have this same issue on a 66 GS so let me know what you find out here. I replaced the springs on one of my other 66's and it didn't seem to lift it enough. Front tires rub on left turns with narrow 70 series 15" tires on 6" Cragars. Anyone have a good solution?
Jim, for a '66 GS, Moog #6033 are a perfect match for the originals, and for the rear, #6197 is as close as I could find. Springs are avail from ESPO/Springs 'n' things, Amazon, or nearly any other part store...
Here's a pic of my red '66 with new springs on it:
http://65gs.com/board/index.php?topic=47.0It has larger than stock wheels/tires on it, 255/60-15 rear, and 235/60-15 front. I can measure wheel center-to-fender lip if you need to know.... that a good way to compare cars.
These springs will work on a 65 GS too, although 65's had different specs.