well that all depends on your budget pistons would be your best choice. milling the heads cheeper but why destroy a brand new set of afr heads. this all depends on what compression your goal is. keep it 10.5-11:1 its cheep on the pocket run pump fuel with alittle race fuel. the best thing you could do is call quick fuel and get yourself the e85 kit from them you will pick up more hp and tq over race fuel and cost you 1.5 gallon the kits runs just under 300 for a 4150 carb.