Thats the size I was thinking about. TBH that would be perect.
Manual boost controlers do get a bad name, but if you have a pretty much standard engine a manual boost controller is good ONLY if you want to increase by 2 or 3 psi. But after that I would go for electronic boost control. You can get them quite cheap.
Manual boost controllers do have a bad name, its always good to play it safe.
Where did you get the IC from??
Ben