5.7 Hemi's Throwing rods?!

Hey guy's I have noticed a alarming trend lately, I own a Towing and Auto repair business and I was over at another shop in town dropping of a car for a customer and the guys that run the shop showed me what was left of I believe the #7 Rod and piston in a 2004 Dodge Ram 1500, piston had cracked in half and had snapped rod in half, I have seen alot of 5.7 Hemis for sale on Ebay that have cracked blocks and have bent rods, and I did some checking and most don't have that many miles one was a 2004 Durango with 53,000 miles another was 75,000 and I guess most vent the block. This is a serious downer for myself as I was wanting to build one for my 1971 Challenger, But if this is the reliability of this motor I don't want it!!! I am Mopar to the core and hate to hear about this, Can anyone shed anymore light on this subject??