rolling back or ahead the speedo mileage

[hatzie]

Originally Posted by wazzabie

It was run for a year or so with the broken spedo not registering. I know roughly what the millage is. On something this old it is exempt anyways. It would be nice to know how many miles till next oil change.

If you have a working replacement speedometer/odometer then just install it and run it.
As you said it's for maintenance intervals not for telling how many miles are actually on the chassis now. That ship sailed as soon as it was driven with a stalled odometer.
When or if you sell it you just tick that box that says the odometer doesn't reflect the actual mileage or something similar and include that in the verbiage of your bill of sale or separate odometer statement.