Just an observation that most of the engine failures I have heard of or personally seen are due to main crankshaft bearing failures, NOT conrod bearings.
We noticed that the main center bearing bolts stretch a full 15 thousandths of an inch over a 12 month/30 thousand mile period...way too much for the center main bearings.
Then its engine failure.
Solution is drop the sump and replace the bolts with heavier ARP bolts.
Hope it help someone. :bouncing: