Unless you covet this rifle, and plan to be buried with it - just buy one. A LOT CHEAPER than what you want to do.
If you must have a CG in 30-06 look on Trade Ex's site for a Stiga or Falun M96 Sporter. Some claim the M96 is marginal though in 30-06.
The 6.5 is such a good cartridge. But if you want one in 30-06 just sell the 55 and get an 06. You'll be better off in the end.