Has anyone run this cam for their 4litre? How much more aggresive is it than stock and can I run this in a pretty much stock 93 4litre engine? It's Mopar performance parts, summit racing part number DCC-4529228AB, intake and exhaust duration of 240, intake valve lift of .430, and exhaust of .430 . Will these settings work with stock valve springs.108 degree lobe seperation. It's an offroad only truck, lot's of rock climbing and low RPM torque. Rarely see's high RPM's unless it's through mud or climbing a sand hill.