The car was based on the XB Falcon 500 Hardtop and featured a 302 in³ (4.9 L) Cleveland V8, and some specific options including the GS Rally Pack which featured full dash instrumentation, a 3-spoke steering wheel, vented bonnet (hood) with locking pins, and 12-slot steel road wheels.

Unlike other GS Rally Pack cars, the road wheels were painted in complementary Polar White, as were the bumper bars and the front grille assembly.

Some Ford dealers such as McLeod Ford in Sydney (well-known at the time for their Horn cars) chose to add accessories such as front and rear spoilers, and/or to modify the interior seating to feature colourful cloth or vinyl inserts.

Ford's records show that 700 John Goss Special XB Hardtops were built, however, how many remain is unknown.

Ford made an initial build of 400 units in July 1975 that sold out quickly and gave them the confidence to do a second run of cars which produced the remaining 300 units in September, October and November 1975, as mentioned in Motor Manual magazine (January 1976).