High compression and good flow is the key. If you can get that compression up to 12.5:1 -13.5:1, then you should be knocking on 180whp's door. BUT, that is considering you have the head ported and polished, and have the bottomend balanced and blueprinted.

Not to mention, the cam is going to have to be so big, that emissons would be the last of your concerns...