what is E9Z ? my 84 Z28 has it, whatever it is, i been running rpo codes on it, theres frickin 77 of them, damn !!! isnt that alot, or ?
3.73 rear with 700r4 and HO 305 9.5cr and 190 horse NET rated, nice nice i like it alot

thanks !
-Fast

 

It all has to do with the speedometer gearing and Vehicle speed sensor... its not important unless your speedometer doens't work.

 

dont have VSS in this one according to the other option- E5Z or E6N, i forgot which now..

i finally decoded it in decoder, had ot mess with it a bit

thanks !