I've been curious if it's worth it to port my Edelbrock performer heads. It's only a 5500 - 5800 rpm motor. So I called the machine shop and the guy laughed at my little heads. He said I probably wouldn't want to spend a thousand $ for porting those small heads. (he might be right) He said I might be able to pick up 25 HP +/- with a valve job. I think the eddy heads already have a 3 angle valve job. I do plan to at least have a valve job done (I have one bent exhaust valve and need new springs). Anyone know how I might pick up HP with just a valve job?