Ok I am wondering if I should just keep my lt4 heads and get bigger valves put in them or go with the afr heads? Also what cam should i get the cc305 or cc306 or something else?

 

well, with the cam part, the cc305 might seem a little small considering you have ported lt4 heads and such
i'm not sure the cc306 is for everyone, so i'd suggest looking at the gm847 and the xe camshafts as well
i think the xe gives you more in the way of options for a camshaft
the wisest thing to do is to check the flow numbers for your heads and go with a custom cam, or a cam that most closely matches the numbers
as for lt4 ported heads or afr's, i'd vote for lt4 heads myself

 

This is good advice. You may find that the 305 is perfectly suited to your head performance, and performance goals of the car.