Buying a Magnum Core- Max Mileage?

yep what magnummopar said! mopar action took the 380hp cam bolted on a set of magnum r/t heads and fuel injection then made 425hp would have been higher with eq heads. Numerous junkyard jewel builds on the net with the 5.9l magnum inspect the bottom end if its all good your good to go. All my daily drivers have over 250k one 5.2 Dakota I have is around 400k.