Dvldogyut

I have a iron block 6.0 bored .30 over that will be fitted with stock ls3 heads and intake and a 92mm throttle body? If that is big enough. I need help picking a cam. It will be a daily driver and I want as much power as I can get and keep it streetable. With the stock springs I can go up to .570 lift. Or if needed I can order new valve springs. Also what pistons should I go with? I was looking at the speed pro hypernumatic pistons from summit but im not sure one if I need valve reliefs or a dish piston? Also what would be a good size injector? I have read 42lbs?