Do you still have those 5.7L Vortec cylinder heads? I have a 97 k1500 that I need to do a head job on. When your piston rings messed up did it mess up the valves or the pushrods or anything in the cylinder heads? Also what are the casting numbers on those heads just to make sure? Please give me a call if you can, 830-220-2847, my name is Tony. Thanks ahead of time.