well i have done it by taking the odometer apart but i would not really call it simple as you need to be careful or it wont work right.
easiest way is finding one with 99xxx miles on it and turning it until it gets back to 00000.0
1966 F250 4x4
1964 Rambler Ambassador 990
Rest in peace departed Slick family members
Cam Milam
Lesley Ferguson
Steve Lopes
John Sutton
A speedometer shop will probably do it fairly cheaply on an "exempt" vehilce. They will probably affix a sticker stating the as-found mileage, but most will put it on the back of the speedo on an exempt (beyond statutory age) application. . It's a pretty simple task on the old vehicles.
Paul
The Ford Orphanage
Life's too short for boring vehicles!
My quest to develop a universal solvent is held up by the lack of a storage container.
Paul
Searching around.... Ran across this open ended thread. Piece of cake setting 00000s on the odometer. Ok I forget now but check classicbroncos dot com. Tech section has a write up on it. Ive redone two clusters. Ill get another three posts down the line line and then post an.... bc it's answered and all up to date. Oh well.....