That doesn't make sense it would have a series 2 stamp on the side of a series 3 engine. Wouldn't be the first time I heard GM do something like this though. How would you know this without seeing the engine pulled from an untouched 04+ Grand Prix, lol.

So then L67 pistons it sounds like then, heard the L32 pistons have a coating on the skirts and the L32 rods are supposed to be stronger because of the powder metallurgy. How much power were they making or what were the people doing when they broke the L32 rods? I have all the bearings, rings, etc already so there is a bit invested. I agree, putting money after bad is a bad idea, but I only have rods, pistons and cam to decide. My friend who used to be a machinist till he got hurt is helping me with the build. My machinist who did the block and head work has grown to like me and has cut me some really good breaks on price. He's been in a few magazines, one of the articles was hooked on Meth Super Chevy.

Thanks for your help