Here's a dyno chart link for an LS1. This is mated to a T56 (6 speed manual), and came out of a 2002 Camaro (but was install in an RX7 apparently). They're pretty flat on torque, all things considered:
Edit: You'll have to view it from the forum yourself, they prevent remote direct linking:
http://www.rx7club.com/showpost.php?...6&postcount=20