Does ford have any other vehicle with interchangable steering column parts compatible Lincoln mark VIII?

No, the Lincoln Mark VIII's steering column is largely unique. While Ford used similar parts across its platforms, the Mark VIII's (especially considering its unique features like the integrated airbag and possibly even the tilt mechanism) doesn't have widespread compatibility with other Ford or Mercury vehicles' steering columns. You're unlikely to find a direct replacement from another Ford model. Parts may share *some* similarities at a component level, but a complete interchange is improbable.