Here's my 2001 Enduro FSR build. First pic is when I picked it up, was mostly stock and obviously wasn't kept up but was solid mechanically. I've since stripped it and rebuilt with all components from my collection:
2006 Fox Talas R 90-130mm Fork (probably soon to be replaced with an '07 Float RLC 120mm as I don't need the adjustable height) Fox Float R shock (just replaced with a '14 Float CTD) 2x9 XT shifters, XTR RD, Truvativ Stylo GXP crank w/ Raceface bashring Avid Elixir 7 brakeset Mavic 223 wheelset on Specialized branded DT Swiss hubs, QR rear, DT Swiss 9mm thru-bolt front. Ritchey post, Titus saddle (soon to add Command Post dropper)
Once I have the dropper, new fork, and maybe get some lighter pedals, I will be riding my dream bike. It already shreds and I have no problem keeping up with the guys on the new hotness with it. Sure the active suspension design is antiquated, but it suits me and I was able to buy and build it without my kids going w/o diapers this month.
I make it 8.75 x 2.5, I could be wrong mind because I'm not sure if there is any difference between the S-Works and standard frame but I doubt it, double check with Specialized first I would.