Originally Posted by
2kSnakeater
Carl the 3rd gens got different clusters not on the engine option but on the trim option, ie Z28 always got the better cluster than the RS even thought the RS had the option of the 305.
Not true. I had a 305 RS (92) and it had the SAME cluster (115) as my 305 Z (91). Ive drove quite a few 350 Zs from 91 and 92 and they had the 150 speedo. The 305 Zs and the 305 RS got the same speedo.