Nope all 250K miles were put on her by me... And the cylinders only had about .003 ridge in them.
My engine guy told me Mopar since about 1988 has had a lot of the base castings done overseas or Mexico.
Thier mold quality control is pretty loose. He's pulled down motors that were weeping antifreeze through the
cylinder wall down low between cyl 2&3. NO cracks, or other damage, it had really small micro perforations through the iron.
When he builds a 318 V8 engine he said it usually takes about 4 blocks to find a
good one.
Also my target redline was 7000, and I'm at about 11:1 compression so we had to be conservative
on the bore given the heat I was going to be generating at the upper end, and I planned on pump
gas which means a pretty high burn temp.
Its all a house of cards... :)
Oh, and there are "Iron Duke" castings which will take a .080 rebore and make 300HP.... Mostly Pontiac.
You oughta see what they do when things go wrong....
Dave