Auto Racing: Horsepower, holley 750, roller rockers

Question
Hello I am wondering about how much horsepower my motor is putting out before I get it dynoed. What I have is a 1969 corvette 427. It is bored 30 over with 10to1 pistons, a 292 comp cam, a perfromer rpm intake, a holley 750, the heads are chevy h/p heads off a 1971 454 have been cut port and polished,and they are rectangled,with bigger valves, and roller rockers, also have ceramic coated headers, with a 50,000 volt hypertech distributor, and 8mm wires, also have a 3,000 stall on the back.I would like to know estimated horsepower. Thank you.

Answer
You probably have about 500 to 600 horsepower, but it's impossible to even estimate actual horsepower. Take it to the dyno, and use what they tell you.

Sorry, but without scientific measurement, there's no way to tell.

Best Wishes,

Dan Liddy
Sarasota, Florida