Lol yea it's the right vin. Listed under 1975 This I copied from Black Dragon Auto:
260Z: Front and rear bumpers were enlarged to meet Federal 5 mph regulations, adding about 130 pounds. Turn signals mounted above front bumper. By midyear, the 260 was replaced by 280Z. 280Z: To meet tougher emissions standards, a 3 mm bore increase raised engine displacement to 2,753 cc, 2.8 liters, producing 149 horsepower. BOSCH's L-Jetronic fuel injection replaced SU carburetors on all models. Transmission and differential gear ratios were changed. California models required a catalytic converter exhaust system. 280Z model was only sold in the US.
http://www.blackdragonauto.com/zZxCatalog.htm