My dad bought a brand new 71 Fury 4 dr . His had a 360 2 bl. I do remember doing a valve job on it years later. When I removed the drivers valve cover, to my amazement, there were two head bolts sitting in the hole that were never ran down let alone torqued! Since my dad bought it brand new it must have come from the factory like that! It made it like 120- 140K miles Like that. I really liked that big ole tank.