If you can do an autopsy yourself it would be good to know wha' happened. Factory left out thrust washers? The experienced can respond, but fading memory of auto part says the washers could have been 1/8th inch (.125") thick each.?? So before slamming effect of the running engine there was a 1/4" space ??
I opening it up and checking just what is worn. I figure it has to be the top case and/or a shoulder on the crank. But as to shims or thrust washers, the parts books show none at all.