its really dependent on the type/brand of dyno and plenty of other variables, but 129/120 is damn good. u should be happy. my old LS/Turbo put down 200/200 at around 8psi with a Greddy turbo kit, which equates to around 125/125 if it was NA. the dyno was a dynojet. there was plenty of more power to be made via downpipe/exhaust and cam upgrades, but I didnt care too much for it at the time.

http://www.youtube.com/user/Specific.../2/aLoCAOj3I_E