340 Camshaft

that one is super close to the MP 480, and would be a great choice.
i've ran this one and thought it to be very decent:
https://www.summitracing.com/parts/hrs-712121-12/make/dodge
and i like this one if you've got some compression and a 4spd:
DODGE Howards Cams 711651-10 Howards Cams Hydraulic Flat Tappet Camshafts | Summit Racing

either way i'd be for sure matching the springs to the cam. aftermarket/roller rockers would be kind of an after thought for me, i mean they're cool but unless i was going solid i wouldn't consider them necessary for the build.

cam selection can be such an objective decision but it's one that has to fall within the operating parameters of the engine itself. deciding on what your compromises are and how much you're willing to change (and spend) up front can make the decision a little bit easier.