I did a little more research and decided what the heck and ordered the cam. Might be a shade big for many heavy haulers, but my Express is fairly light compared to a Dually or a Workhorse. Seems the cam is Mid 220s @ .050 on the intake, mid 230s @ .050 on the exhaust, .510/.510" lift and cut on a 114* LSA opposed to the stock 118* LSA big block cam. For $360.00 shipped for the whole take-out cam kit, it is hard to turn down. 425 HP 496 mag reaches 425 HP before it reaches 5,000 rpm.