3B Yes these weights add what is needed for the difference to any neutrally balanced flywheel they make one for the 400 small block and one for the 454 big block. When I get the new weight I will need to take it and the flywheel along with the flywheel that the machinist balanced when the motor was built so he can match it. He will actually need to lighten the weight as the 496 stroker rotating assembly from Eagle that was used is a little closer to being internally balanced than a stock 454 The good thing about using the balance plat is if I ever wish to use an internal balanced motor I will be able to just install the flywheel without the plate.
