I figured I would be close with 10.5 compression, fully ported heads that flow 300+, and a [Email]255-260@050[/Email] solid roller. But maybe it's more likely Id be at low 11s. And to me 11.20's is alot different than 10.90's. Do you guys think all the above, but with 493 or 505 cubes would get me there? Greg a hemi is not in my budget, but I love your car and how it runs.