My only reservation in seeing setups/results like that is the longevity of the motor. It ran that great once or a few times on the dyno, but I tend to overbuild mine for daily driving conditions. Will a motor that makes 450 whp on stock sleeves pushing 30psi last that long? I don't really know. I only know what I did, but I didn't experience a blown motor so I don't know what too little in the build is. I say better safe than sorry. $1k for sleeves done right is better than $1k for another block that you have to start over with. Just a perspective to consider.