I highly suggest you get your exhaust in order first, like LT/ORY, before you swap the cam. Otherwise you won't get the full potential from the new cam.
Chesterton, eh? Not far from me. My WS6 is in the garage until it gets warmer!
Contrary to what others will tell you, no need for a tune if you first do a header/ORY swap. A tune is good for *any* car, but not necessary for a MAF car like the LS1 F-bodies. However, if you do put headers/ORY on, your SES light will be on until you get it tuned. You will also reap the rewards of better MPG with only the headers, I did. On the highway, of course. In town, you can't keep you foot out of it.
______________________________