More than likely yes, you'll need to modify the bolt. If you don't feel comfortable with modifying the bolt you can always make it a scout rifle with the LER scope. The mount replaces the rear sight and they're quite nice actually, as an alternative idea. You may also need to change the safety too depending on your mounts and scope.
If you have the mounts and base, tape 'em to the rifle and work the action. Or figure out how high they'll sit with the base, mock up the scope or a piece of tube and see how it all lines up.