So I got a iron 6.0 with all the ls2 transfer parts done, intake, oil pan and such. Got it in the car to fire it up and hear a knocking song so back out it comes get into the motor to find a bent rod. It is running the stock rods and a 8cc dished piston. So here is my question thinking of changing to a 6.125 h beam rod and some 2cc dishes pistons with the 72 cc combustion chamber. This would improve the geometry inside the motor and up the compression just enough to keep me out of running race fuel. Would I have to have the to send in the rotating assembly to be rebalance with changing the rods and pistons? I guess I always thought you balanced the crank. Not the assemble as a hole. I always weighed and matched the rods and pistons but I ran into an arrival that said if changing rods and pistons the balancing would need to be redone. Any input on the way this is done?