Honest Power Expectations

Ok. I've definitely come a long way since my last couple posts here,but I've got a few more questions. Here's my current set up: A 67 390 .060 over (speedpro pistons of some kind, I think they're forged), an RV cam, rebuilt heads, PRW roller rockers, New distributor, Edelbrock Performer 390 intake, Holley 750 DP...she runs good, hell, great.

I just ordered a new cam, lifters, and timing chain from Lunati. It pulls from 2,000-6,000, has like ~.580 lift, and is for this application. What kind of power would I be expecting realistically?

Not enough information on engines specs to do much more then make a good guess.... What you have (if it's a good set of heads) sounds similar to the old GT engine, they made about 335 horse.