You didnt mention the carb, if i was trying to pull out some X-tra hp from a basically stock motor on a budget and it was a 396, i would go with a Edelbrock performer rpm cam, or a cam close to those specs (nothing too big) and a set of roller rockers and if it didnt already have it i would get a 750 vacuum secondary on there. Holley of course. You already have a decent intake you mentioned. Maybe a little hotter coil also. That should wake the motor up a bit. Check Ebay out man, you can finde some really really good deals on big block chevy parts. just type in big block chevy and you'll get like 16 pages of parts. check it out. later,Joe