Darren...
Assuming drivetrain losses, you're making anywhere from 290-310 hp, probably a bigger range than that, not sure what kind of D/T losses you have. Does it sound cool? It's quick, right? So be happy with it! If you want a laminated dyno sheet that is bigger than mine, or his, or his over there, then open up the wallet. The motor will do more, to be sure!
I took my HP and TQ numbers down off my little avatar. I figure, who the heck cares. I built a 408 the way I wanted it and made over 500 horsepower. Yeah it runs on pump gas, but it runs a little better on Cam 2. I was hoping it would run best on pump. You'll read all about pump gas windsors making 8 gagillion horsepower, and it is not true. I figure if I can run a 12.0 1/4 mile, I'm not going to write it on my windshield when the Ford Excursion next to me that only has the 5.4 in it has "10.1" written in his windshield.
Why get into the "who has bigger balls" war when the guy next to me has a couple of baseballs crammed down the front of his pants.
No matter what you do, someone will always have more power than you. Someone will always be faster than you. And if you are the chosen one that has more power than everyone else and is faster than everyone else..... someone will always *claim* to be faster and more powerful than you.
I'd say pick your battles... and enjoy the crap out of your car. That's what they're for - not to be the fastest.
JP