Re: 429 engine help
Rebuilt to stock specs, you ought to have a realistic 320HP with those parts.
An aftermarket dual plane intake will help, as will a mild cam. Slight power upgrade w/o lopey idle? Something along the lines of a Summit Cam # SUM-3500 will do that. There are lots of cams out there and better choices, depends on the overall build and application.
One final recommendation while the engine is apart is to do some head porting, particularly on the exhaust side. That will wake the engine up.
We're on the web; click below: