Vin number listing that identifies by vin number production line cars. The earlier cars were not KOH or Pilot line cars. They were produced as a standard production line car and cut up/modified to accept Phase 1 motors for trial fitment.
The 1988 cars were designated KOH and you can see the production vin numbers for those cars, though they do not have the J designation in the vin the build sheets were changed by hand to identify the options that later became (1989) the ZR-1 options with the J designator in the vin