Those particular wheels most likely are aftermarket and did not come on anything new. The r-model GT350s had American Racing Torque Thrust wheels. I am not sure if they came on the regular GT350's or not, I have ssen many with them and the Cragar/Shelby wheels.
------------------
67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Aluminum Heads, Edelbrock TorkerII, Carter 750 CFM, Comp. Cam 477/510 219/233@.050, Performance Automatic C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.
My 351W Fastback