Who says the LS engines "blow up"? The reason people brag about the cheap salvage yard is because chevy made so many of them that they are abundant in the yards. If Dodge could ever crack the sales numbers of ford or chevy, a lot of this argument would be moot.(aside from the hemi needing everything other than heads to be competitive in a street/strip build)
Think of how many chevy service trucks there are? When my job used chevy's, they would trade a few thousand service trucks every two years. And typically those work trucks have their interiors beat so bad in two years that the trucks go right to the recycler.(80k in two years is remarkably hard on a vehicle)