I just verified with the parts company that the 47-51 chevy gauges are a brown color where as the 52-53 gauges are a grey color. Now the question is, can I replace my 0-90 mph speedo decal with a 0-80 mph speedo decal? Will my speed be accurate?

1952 Chevy 3100
http://s1107.photobucket.com/albums/h394/52ChevyProject