Scott,
If you don't want to mess around with decals for the odometer, Jim Carter sells a reproduction odometer. I bought one from him on eBay. Here is the link to the part in his catalogue.
http://www.oldchevytrucks.com/cart/product.asp?prodid=SP180&i=9935|||||


1966 Chevrolet Caprice 2 Door Hardtop (396 Big Block)
1951 GMC 9434 5 Window (waiting on a 292 transplant)