You need to talk with camshaft manufacturers. Give them your vehicle specs, especially if you have any modifications. For example you've already said you will get the Mopar Performance PCM, which is your only tuning option for your year, which is OBDI. You'll have to let them know what your application will be (i.e., hp or tq, towing, daily driver, emissions, etc.). There is no "best", there is what fits your intended use.
Here is a link showing what the stock 5.2 and 5.9 camshaft specs are. You'll have to learn the terminology.