We'll if it has an RS badge on the back that usually means top trim V6. Unless of course he removed the SS emblems and replaced them with the RS. Not unheard of to debadge, but pretty rare to rebadge with a lower trim level (although also not unheard of).
Admittedly, Chevy made the trim...
Camaro guy here, and former V6 modder (until I upgraded:headbang:). You'll smoke him. One, our fastest FI V6 on Camaro5, GretchenGotGrowl, was running twin turbos and was still in the mid 500's in hp. So your coworker has his information wrong. Two, getting the MACE cams properly installed and...