As the rules allowed wider tires and starting line practices, the added traction from tire width, and the increasing horsepower would just break the frames. While teams kept welding them up, by the end of the season, very few were still running or competitive.

Truthfully, though F/X and S/S evolved nearly overnight. Chrisman's fuel-burning '64 Comet, the Thunderbolt Fairlanes and the Hemi Belvederes would redefine the classes for good.

A recent post in one of the Ford FB groups noted that once Special Vehicles had distributed the '64 Galaxie lightweights to the "company car" racer list, the rest sat unsold in a storage lot at the Wixom plant. It would take well into 1965 to clear that inventory. It seems incredible today, but, Ford had to build enough to chin the NHRA requirement (IIRC, 50 units) whether or not customers had signed up for them.

(Supertrivia note: While Galaxies were not built at Wixom, the plant was in the hinterlands of west suburban Detroit, far from the prying eyes of Ford Division company auditors or car thieves.)

Incredibly, some '64s had their fiberglass bits shelved and were converted back to steel by their owners to serve as class racers, but no hard records exist to say which of them ended up this way.