Only 460hp

I'm not absolutely certain on this, but from what I've read you're looking at 3-4% per point of compression. So going from 9 to 10:1 is going to net like 20 HP. Is that your expectation?

What are you doing about head and cam, while everything is apart? I think these are the problem areas.
According to Brian Hafliger at IMM my cam is not the problem. He's made 500hp with smaller bumpsticks. More compression for sure. I want Trick Flows. The HS rockers are required with Magnum heads due to oiling but is "recommended" with LA style heads. I'm gonna just bite the bullet & buy them.