Saw lots of questions and figured Id show you my conversion to Boyd's Tacticool on my Trophy Hunter XP.
This is the stock you need. Note, if you have a long action, both stocks from the drop down menu, 111 and Trophy Hunter, are the same stocks and meant for the long action version.
In addition I ordered these parts from Savage:

Part No. 106705 - Frame Assembly $78
Part No. 107217 - Trigger Guard $26
Part No. 106235 Magazine Box Assembly $51
I also ordered longer screws as advised by some people but the longer screwed ended up shanking out, so I used the factory. Also, you can use the factory trigger guard, but it's a good step up from plastic if you just order the metal one with everything else. The frame and trigger guard fit snug into the Boyd's stock so I put those in then dropped in the rest and bolted it up. Torqued it snug until I can get my torque wrench on it.