Thanks Danny, I did a quick search and didn't get any results. I for some reason missed the KB of the side. I focused on the LS. I believe the pistons are the cast Hypereutectic aluminum alloy and not forged, which seem to work fine in all but the most extreme situations. I have used Keith Black forged pistons on hot Corvair turbo engines so it is funny that I didn't recognize the pistons. Thanks again for the help Danny!