need to learn about camshafts....

Ignore Camquest.it blows.On a Magnum,with stock heads,you are limited to. 510 lift.The lifters are reusable.Peak lift on stock heads are .480/.490 lift.If not porting heads,run with that lift.Youwill need new valvespings/retainers,call Hughes on that.Spend the extra C note on a new cam core,otherwise you have to deal with valvetrain silliness.Crower was the cheapest,stay away from reginds if you can.