Is the 160 MPH speedo from a 68 Firebird a direct fit to a 68 Camaro? Will it indicate the correct speed? If not what has to be changed to make it work properly? Just thinking after looking at my friend's parts car. I also have to check if it has the low fuel indicator lamp that my car has in the speedo, it was a pain in the neck to make it work and I don't wanna loose it.