Texas Specials into my hss strat?

I have a 2006 MIM fsr hss strat (the strats with a humbucker at the bridge position). Playing through a fender deville, play .12 strings tuned down a half step. SRV is my goal. So naturally, I want to switch out the tex mex's that came wiht the guitar to so texas specials, as I hear they're made to mimic SRVs tone (not playing of course ;) ). Obviously I will need a new pickguard, as the one with my guitar is made for a humbucker. But can I just throw them in? The pup cavities in the body is what I'm worried about. There will be free space in it. Will that be a problem?? Any suggestions as to what else I may need to use these pups to their full capacity, or installation with the current body? Also, any suggestions on pedals to acheive the sound I want? Right now I usually play with a boss blues driver and either a MXR dyna comp or boss compression/sustainer for subtle compression (i think that really helps the sound). THANKS IN ADVANCED - -- - - GO BLUES OR GO HOME!