Chassis numbers are usually a bit disappointing(to the owner anyway) because they just don't sound like enough hp. It's all pretty relative though. All setups are different but it would be nice to nail down some hard numbers on the drop though.

Chsssis dynos usually run from $50-$100 for 3 pulls with no tuning. A dyno tune session runs around $400-$500 around here. More if you're turboed or supercharged.