67- 320 HP 390, 355 HP 428 in GT500, 520 HP 427 in GT500 Super Snake
68- 315 HP 390, GT500, 360 HP 428 Police Interceptor, 335 HP Cobra Jet 428,
68 1/2-428 Cobra Jet 335 HP
69- 320 HP 390, 335 HP 428, Mach1, 325 HP 390, 335 HP 428 (with or without ram air), Boss 429 with 375 HP
70- 335 HP 428 Cobra Jet(base and GT500), Boss 429 had 375 HP
71- 370 HP 429 Cobra Jet with Ram Air.