What about 'radius' cut valve jobs? The machine shop I took my cousin's 440 heads to to get freshened up spec'd a 3-angle radius VJ IIRC... The engine is not yet running but will be soon. It's actually a similar build to what the OP wants, mostly freshened stock parts, mid-range cam, RPM intake, headers etc. going in a '71 Satellite.
To the OP would you mind posting a pic of your engine bay? I have a pair of the Hedman Tight Tubes shorty headers on my '70 Duster and the way they are laid out I think they would work perfectly in a truck application (and are about 1/2 the price of TTI's which I doubt will give you any more power with that mild of an engine).