nothing those little bowtie wearing geeks build will EVER compare to what the real truck builders create. These engines are built just the same way BIG trucks are, to last a million miles with NO internal issues, and they NAILED IT!!! have you ever noticed when the magazines spec out a "hot" dinkymax, they devote a whole paragraph to the internals? rods, pistons,crank,and everything is balanced, bluprinted(?) and massaged in some way, all to survive the power level that a STOCK BLOCK and HEAD cummins willthrive at? (other than head studs, which CAN be swapped without removing the head) I have made a RELIABLE 490+ hp rwp (maybe 600hp crank ) and drove it with NO issues for over 200k mi. My good buddy, who USED to drive a GOVERNMEN MOTORS diesel would regularly get left in the dust and cummins smoke towing our almost identical 5ers finally saw the stupidity of driving a "wanna be a corvette" when there was work to be done. he now drives a early (12 valve) 2nd gen and is happier than he EVER was with that 06 money magnet !!!! TAKE THAT, BOWTIE BOY