what year? im gona assume cable driven speedo. its not the best way to measure your accuracy with another cars speeds cuz who knows how much it could be off. but since you had multiple drivers tell you that, i would say that it is a safe bet...
85'
Yes cable driven.
I marked out a mile with a newer vehcile (2000 F150) and drove it with my truck. The two odo's where right on with each other. I guess I dont get to tack on an extra MPG
Bubba Bob 
Threaded Mode
