unless your building a race motor I cant see the advantage. (not very usefull in a jeep) with constant adjustment and all.
On a side note theres a guy up here in chatam ON that has a jeep powerd race car I'm not sure what cam he's using but I do know its all custom stuff, crank, intake, rods, valve etc. It makes over 450hp but he rebuilds after every weekend and hes runnig 3 side draft carbs.
my point you can get pretty wild with the stuff out there so why bother?