Thanks, so am I to assume that unless otherwise stated, all entries on the CD refer to all Z models, but not the ZX? Secondly, I guess I got stuck with a 280ZX brake booster that was advertized to work in 240s...see ad below. Well, it doesn't fit. Is there anything I can do? "This is a clean brake booster off a 1979 280ZX. Don't spend $500 plus at a discount! It will work fine on a 280ZX, but also is the "trick" set up on hi-po 240 260 and 280 Z cars that are in need of an upgraded brake system. I understand it bolts right on the 72 and up Z cars, and is one of the "tricks" for a 4 piston or 4 wheel disc brake rig" Thanks, Joe