75 Firebird Tach Question
 

I have several instrument clusters that I was told fit a 75 Firebird. My question is what was the difference in the cars that had the 6k and 8k tachs?

Re: 75 Firebird Tach Question
 

Can you post a photo? The 70-74 were the higher 8000 RPM tachs, I believe, and the speedo's went a lot higher as well. The speedo in my Gramma's 75 Firebird goes to 100 while the 73 goes to 160

Re: 75 Firebird Tach Question
 

8000 tachs were used till 1976. the speedo went from 160 to 100 in 1975 Tachs were lowered to 6000 in 1977

Re: 75 Firebird Tach Question
 

It looks like these were 77 and later gauges that someone was going to put 8K tachs in.
http://i375.photobucket.com/albums/o...40605_0011.jpg
http://i375.photobucket.com/albums/o...40605_0021.jpg
http://i375.photobucket.com/albums/o...40605_0031.jpg
http://i375.photobucket.com/albums/o...40605_0041.jpg