You can get a kit from PT&G that includes a new firing pin. If you just get the new bolt shroud and safety, you'll have to do a bit of milling on your stock pin assembly to make everything work. The kit with everything from PT&G is about $450 shipped Canadian if I recall. It also only comes bare stainless, so if your rifle is blued or coated, you'll have to do that as well. Lastly, you'll have a gap beside your tang when you remove the safety lever off the trigger. Easy to deal with, but unsightly if you leave it that way.
I have a 700 AWR I plan to mod this way - just waiting for the parts. It's probably a waste of time and money, but I like tinkering and I HATE that the bolt isn't locked on down. I've left more than one round on the forest floor when my coat or a twig opened that action while carrying.
A guy could just buy a Kimber or a Winchester right off the hop and save the hassles.