I'm planning to buy a used 6.0l (lq4-lq9) and would like to know what pistons/head combo I need to go with to make around 400/450 rwhp the cam I'm thinking about using is a 233/239.595".603 " don't need a cam too big being this is going in my 2003 silverado daily driver and will be useing 93 pump gas. Any suggestions will be great

My truck currently has a 5.3 228-230 cam 3200 circle d stall and hooker long tubes