No disagreement here that a factory nodular 455 crank is strong and up to the task. The ONLY thing that would make me a wee bit apprehensive is the sheer number of cycles on it. I would trust a modern day forged crank and have better peace of mind with it than a ~50 year old crank....but that's just me. If that same crank had been in one of my engines for most of its life, I might think differently about it.
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