Could I just Out ls6 springs in some 5.3L heads and slap them on with a 02 Z06 cam? The rest of the engine is pretty stock. I don't think there are clearance issues. The heads should bolt up with no machining, right?

 

I sold my old ls6 cam, springs and rods to a guy who put it in his dad's 5.3.

...if that helps...