If that's the case, why would this one be cracked? Not doubting what you say, but if mine (which looks OEM) is cracked, I would like to know the root cause and address it.
Well my point was is that your original flexplate failed after almost 50 years. That's good service life. If you don't constantly abuse or drag race your car, a stock replacement will probably last another 50 years. Install what ever you want.
