You are going to have to go to forged rods, the part where it says 6.125 rod length means the wrist pin location is moved closer to the ring land to accomadate the longer rod but keep it to +.008 or less out of the hole. That also means it has the .927 wrist pin, the stock rods are 6.098". If you want to run stock rods you need to look for one that is made for 6.098 rods and a .945 wrist pin, to my knowledge Diamond is the only manufacturer that I know of that has them ready. But IMO it is dumb to use forged pistons without forged rods. In summary those pistons will NOT work with stock rods.

 

so that means factory ls6 rods and pistons wont fit my crankshaft or will they.

 

They will work, factory stuff is fine and all interchangeable just not aftermarket pistons(for the most part) due to smaller and relocated wrist pin.