I got a set of hads for 40 bucks. Guy didn't know a whole lot about them, but for 40 bucks I gambled. They are LSX Based heads, but I don't know which ones they exactly are. The numbers are 706. If I searh correctly they are 5.3 heads, but I haven't seen these numbers on any posts on here. Anybody know?

 

They are later 5.3L heads. Nearly identical to the heads on your car with the exception of slightly smaller valves and a smaller combustion chamber.