I never seen any 383 motor run well with one of those dang Mopar 284/484 cam, even when they are degreed in as compared to any decent after market cam with similar lift and duration. I do know of several Mopar car owners that thought there motors ran okay, even 440 pmp gas motors, with that cam until they got a better cam with similar numbers
They are cheap to buy like a lot of the Mopar cam kits are, but do you really want a cheap cam and kit in your motor or a good one
OP, I have heard a lot of people on this forum say the Mopar "509" hydrualic kit is a really good cam for the street