Here are two shops I use

http://www.ddspeedometer.com/ out of the twin cities.

http://www.speedometersolutions.com/ out of milwaukee.

D&D speedometer and D&D instruments are a full blown gauge shop for new and used. Buy a lot of stuff for work from them. Speedometer Service of Milwaukee has a calibrated dyno used to calibrate speedometers in cars. They do all the squad cars in Wisconsin. They will speed dyno your car as well. Used to be $20.

Hope this helps.

Scott


The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me