Arent L92s Iron blocks? I wonder if they've just gone to one aluminium 6.2 block and use it for L99, LS3, LSA and LS9 to save on tooling. Didnt they start putting LS6 blocks into camaros in 01 or something?
my LS3 heads are 0821.
Here's the only thing i can find about a "stock" ls3 piston and its just an ebay set of hyperpathetics.
http://www.ebay.com/itm/LS3-L92-L99-...e224ef&vxp=mtr