318 LA rebuild after losing a valve seat

It does not say the rods are are a 100 gm change. It says the overall change in the swap could be as high a 100gms. Since the late rods are pressed pins, I would assume he's talking about the pistons being on there as well. So, IMO, the swap actually reads ; the 73 up pistons and fat rods which sat on a cast crank, onto the 273/318 steel crank.