Scope mount for Ruger M77 Mk2

[tinman1275]

Anyone have any good suggestions for scope mounting on an M77 long action? My current one can't be adjusted back far enough, and I'm not sure if I'm better off trying to source some different Ruger bases, or just give up and convert to something like this:
http://www.jackweigand.com/Ruger-M77-MKII-Rifle-Scope-Mounts-No-Drill.html