what parts to get for a 318??

so im sure this question has already been asked but iv spent a couple hours searching through the forums and cant find a definite answer or list so im sorry to those who have answered this question a thousand times but iv got a 318 in my duster with a 904 and am looking to get in the 350 hp range the only thing I know about this motor so far is that it has a 4bb carb and a new mini torque starter (probably the hardest damn starter iv ever taken out because the old one was a stock huge one) I want to start making a parts list but don't know what parts are actually worth a crap and what aren't so if someone can give me a shove in the right direction it would be much appreciated :cheers: