Oh, also, cuz the truck is new to you. You should get a coolant flush kit, (the type that you hook up to a garden hose) and flush and lube your coolant system. Flush it with the good cleaner, watch the brown crud come out, then put the protectant in. It will make a difference in the whole engine, as it cleans out the passages in your block and heads.
This is from personal experience, as having a plugged coolant passage in a block is a bitch. Especially when it feeds your heater.
here is a link to some good info...
dodgeram.org/support_pgs/tech_index.htmI
am was a mechanic, and these trucks are easier to fix than most vehicles if you keep up the routine maintence.
Weak spots that need watching...
Vacuum system, it runs everything from your heater box too your front axle. Engage your 4wd about once a month and drive it on some dirt, this will keep the dashpot and front axle seals loosened up.
I had a problem with my cruise control, and it was just a broken vac line. The cruisec dashpot is hidden under the battery BTW...
Oil changes, the 360(5.9) is a darn good engine. Its lineage can be directly traced back from the original LA motors of 1964 with the 273, the Hi-Po muscle car engines 340-360, to todays workhorse. However, unlike BMW or VW, even with synthetic it needs the Oil changed within a normal period, say3-5kmi, not 8-10kmi like some designs. This may cost you more in the short run, but it will really make your engine last longer. Same goes for tranny, reliable, old school tough, but not maitnence free.
Hope this helps. Enjoy your Ram