[rubrhammer]

You can change the cluster with one with that many miles. The computor does NOT track the miles. It does however track the hours run. In NY the mileage is recorded at each annual inspection and many insurance companies reqest mileage figures periodocally from owners. So there is a mileage trail on your truck. I run a diesel cluster when I tow my trailer so that I can monitor tranny temps. The mileage accrued while towing isn't showing up on my truck. This is a realatively small amount of my driving so its no big deal for me. I also bought an enhanced ECM for it years ago so even the hours don't match with the truck. IMHO as long as you don't missrepresent it when you sell it, do what you want.
BTW, it takes under 5 minutes to change a cluster. (4) 7mm head screws and 1 plug in connector. The bezel just pops off and on..
Bob