well it does chop a little lets say like a lt4 hot cam on a 350ci id say, specially when cold, I set it up for 800 rpm desired idle, and actually I have the cc503 since I got stock ported heads, I like the tq manners for a dd and steady rpms on traffic, and yeah pulls really hard, on street tyres it smokes them pretty easy, even on second gear, and 3rd depending on the pavement, so for dots wowwww, heres the vid I got true duals on it you can find me on youtube
http://www.youtube.com/derekz28 vids from my car there, and here are the idle ones if you dont wanna go and see some of them
http://www.youtube.com/watch?v=xN-B6PkuoK4
basically, having the cc503 stock heads and 383 its quite a torq monster, mine pulled around 360whp and more than 400wtq so yeah I would say its quite what i was looking for
good luck buddy