Nissan released the Datsun 280Z model for the U.S. market in the 1975 model year. In a further effort to keep the S30 models sporting in the face of increasingly stringent U.S. emission and safety requirements, engine size was again increased, this time to 2.8 L. The L26 engine was bored out .2 L to create the L28, and a Bosch L-Jetronic fuel injection system was added.
In 1977 and 1978 respectively, Datsun offered two special edition models. The "Zap" edition was offered in 1977 as a "special decor package". Zap cars were finished in "sunshine yellow" paint, and sported black stripes down the center and sides, with yellow, red, and orange chevrons at the front ends of the stripes. An estimated 1,000 "Zap Z" cars were offered in 1977. The "Zap Z" model was also used as the pace car in the 1977 Long Beach Gran Prix. The Black Pearl edition (produced in 1978) came with black pearlescent paint and a "special appearance package" (SAP), which consisted of dual racing mirrors, rear window louvers, and a unique red and silver stripe. It is estimated that between 750-1,500 of these cars were produced.
Source: Wikipedia (original)