This is a 1/1 built by Dearborn Steel Tubing, guess they were hedging their bets for '65 not sure where the class occupied by the T-Bolt would be going.
The primary factory effort was applied to Mustang, but Total Performance meant all of 'em, so there were FX Falcons, Comets and Galaxie race cars in the FX classes, including B- and C-FX.