how much gain should I get?

[Ludester]

your gonna be close to 200whp. you might not make it but you'll be close

[Jaimecbr900]

You're not going to gain as much as $1200 worth unless you plan on it being an add-on to other power adders. Cams are only one side of the equation, so you'll need fuel and management too. I think you mentioned you already had management, but you need it all in order to see the kind of gains that are noticeable.