318 heads. whats your route??

i have a 1992 318 magnum straight out of a dakota sport...

what size would the stock valves be? any good advice on getting some power out of that engine...

I'm planning on putting it and the tranny in my 71dart..

as far as a build up of the engine, probably go with a mild cam near .480 lift, underdrive pulleys, and probably mill the heads .020 or so to up the compression a lil, and a set of mid-length headers, and a mopar computer..