GM 350 Crate Engine Rebuild

I'm buying a used 350...330 HP ENGINE and needing some suggestions on a better cam and are these heads any good, should I upgrade to a new set of heads ???

Also how good are the bottom end on these engines ???

Would like to get it to 400 HP

This is for a weekend cruiser.. Thanks for any help

I would figure out which one you have (compression ratio, 4 or 2 bolt, etc) and call up Comp Cams or Lunati, etc and let them know what you have and what you plan to do with it. They should be able to help you out.