The 67 and 68 GT 500's were equipped with the 428 PI (Police Interceptor) engine. It was rated at 360 hp. (note cj was "rated" at 335) The switch to 428 CJ came mid 68 and these cars are denoted as GT 500 KR. In 69 the KR was dropped but the 428 CJ remained. All 70's were 69's that didn't sell, were given stripes on the hood and chin spoilers.
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