1968 Barracuda Notch - Plano, TX

4spdragtop said

Looks great! Question though....I've been thinking bout this for a while...the speedo, converted from 120 to 150, how does it stay accurate for 150??

Click to expand...

"Velocimeter" - sounds so much cooler. Why did they change it?

They use an electromagnet to adjust the field strength of the magnet inside the housing to display the proper range.

Read the section titled "Eddy Current": http://en.wikipedia.org/wiki/Speedometer