I didn't read the entire thread but I don't thnk you're going to beat a cammed / exhaust LS1 WS6 with drag radials. When my 2000 GT made 376 RWHP I ran my buddy in his 2001 Z28. He had longtubes and custom true duals, the air lid and drag radials. He ran a 12.45 I ran a 13.1. I ran on worn street tires but launched OK. He immediately put 4-5 lengths on me when the light turned green. Oh and he was auto with a stall converter too. Those cars can be really nasty with little work. With a cam and drag radials I'd say he knows what he doing. Good luck let us know how it goes !