A completely new design was also slated for the larger 1967 models. This strategy added $60 million in retooling costs, which was a major stretch for the company. The objective was to position the 1967 AMC Rebel and Ambassador designs on an equal basis with competitive models marketed by the Big Three Economy Brands, Ford, Chevy and Plymouth. The new 1967 models also came with completely modern "GEN-2" AMC V8 engines. AMC also introduced a revolutionary guarantee: the engine and drivetrain were covered for five years or . The media was positive in covering the new models, with experts such as Tom McCahill highly praising the new car's performance and ride comfort.