The flywheel for the original 235 from my '57 3200, which I just rebuilt, is showing some several inch long hairline cracks around the inside of the center hole. I figure it to be scrap. (Correct?) Can I substitute a '58 261 flywheel that I have or will it throw things out of balance? I notice that the 58 261 flywheel has a ring gear on it while the 57 appears to be all one piece. Also one is marked GM40 and the other GM44. Otherwise they look the same. Any help appreciated!


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