150mph speedo?

RedFish said
Poor boy method... create a custom screen and change speedo drive gear at trans to get it closer to accurate.

This is what I am planning. http://www.whitegauges.net/categories/Plymouth/ Has $20 decals for the gauge faces. The set I got has both 120 and 150 MPH in the same kit.:blob:

This may or may not work for your model.