My buddies 1990ZXtt seems to be a little different than mine. Only reghuarding the AC...His has the ambient temp on his climate control and mine doesn't. Also mine seems to be a little easier to control where his seems to be automatic(it turns on full blast). I was doing some searches and it was stated that 1990 had the ambient temp gauge and the 1991 lost that feature. Just wondering! mine was made in 6/90.. Not sure when his was made.
Follow Ups
Is There such a thing as a 1990.5 300zxtt? - hubbellz23:41:52 07/21/05