Dude, that motor will easily make 400rwhp, probably a lot more. It's got great heads, good compression. That's the key. If you get the right camshaft, you're there. I seriously doubt you will have to spin it that high. I'm guessing you can shift at 6500rpm and get peak performance. I'm making close to 400 at the wheels iwith 192cc heads, 10:1 compression, and an out of the box cam.
Kurt
Kurt