ALL YOU SIXER GUYS OUT THERE!! C'mere!

im thinking of building a pretty potent sixxer. 225. im thinking of porting and pollishing the stock 72 head, bowl blend as well. and makin an intake to suit 2 2bbls. anyone know of a cheap place to get 2 piece headers. what cam would you suggest. im thinkin maybe 230 for hp as a goal. with the head work it might be obtainable. any of your slant six secrets as far as hp please share. this might make me change my whole thinking. might sell my 318 and get a 3 speed for a slant 6. i need some input