I'm still waiting for anyone to say they've got a 4" stroker with more than 50K miles on it. I've never seen or read about one. I believe it's not because they are so long lived, but rather they simply are not in vechicles driven that much. One 422 I built 4 years ago was buzzing around MA at 4500rpm on the highway last weekend (he was speeding, the car has 3.23s and a 2200 convertor...lol). It's got over 20K I think over that time including several drives to Carlisle and drag racing. But like most other topics here, I think "wearing out prematurely" is a matter of personal opinion.
I'd also think if this was a myth, you would be reading about ones that have much higher mileage on them. So far, using MAD's deeply scientific method, the highest expected mileage is somewhere higher than 30K...lol
