The Cranes MUST be good since they cost about $750. Biggest problem I think is just most Mopars have a heavy valvetrain. Whatever you do stay away from Comps HR lifters. Morel has 2 grades of them, find a dealer for them and get the better of the 2. Use 11/32 valves and titanium retainers. There was a guy I read that basically set lash on the Morels by bottoming the plunger out completely then backing off like a 1/4 turn and claimed 7500 rpm on a BB Mopar. Whatever, it would be a potentially expensive experiment.