The 390 cu in (6.4 L) V8 engine continued, but upgraded to new heads with 51 cc (3.1 cu in).
combustion chambers that increased power to 325 hp (330 PS; 242 kW) at 4800 rpm and 430 lb⋅ft (583 N⋅m) of torque at 3200 rpm.
The revised rear end also featured full-width taillamps and a single center-mounted backup light. Side marker lights were now shared with several other AMC models.