Flexplate is not fits the torque converter

How much weight difference is there. I think an LA. 360 is 19+ oz. What about a 400/440 cast crank plate. I believe it’s 12+ oz, but not positive. What is the magnums weight? Kim
For example, the required amount of off-set on the balancer end is 534.3 grams for the 360 and 314.4 grams for the 5.9 Magnum. The rear end of the engine has the same thing going on, on average there's only about 60% of the weight off-set that the 360 has compared to the Magnum.