Thanks guys… the speedo is off by 6 mph across the board. Actually, it starts out at about 10 mph low, and at about 65 it is 6 mph low.I’ll have to check the odometer accuracy- I didn’t think about that. They don’t have those “measured mile” markings out where I am- do they have them anywhere anymore?

Last edited by Norcal Dave; 02/03/2024 2:19 PM.

~ Dave
1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission