[Ieatcamaros]

I can tell you, don't waste your money on that sunpro stuff at Autozone. Spend the extra dough and get an autometer. They come with wiring instructions. Look at the tachs on autometer's site, they have all the dimensions of their tachs. This way you know for sure if it will fit before buying one. Some of the 5" tach use a 3 3/4" (I believe that's what it is) mounting hole.