No 318 in 67. There was a \6, 273 2bbl, 273 4bbl Commando (Formula S base motor) and 383 (Formula S optional motor). In 68 the 318 replaced the 273 2bbl motor and the 340 replaced the 273 4bbl Commando motor as the base engine in the Formula S.
I would be hard pressed to say the 426 Hemi was available in 68. The Hemi was not a factory option these cars were purpose built Super Stock drag cars built by Hurst where as the 440 in 69 was a regular factory option. The Hemi cars weren't legal for use on the roads and were sold to drag racers like the Drag Pak Challengers are today.
