Originally Posted by BillJinOR
Valve stems should be opposite sides of wheel as said...
Not always. Motorhomes and pickups are different because the wheels of pickups are usually smaller, and the OP is asking about a pickup. I don't know his Dodge Ram, but my Chevy dually has 5-spoke wheels, which means there are 5 openings. If I mount my valves 180º opposite each other, the inside valve will be behind a spoke and will be completely inaccessible.
I sure wish GM duallys had 6-spoke wheels so I could do what you suggest.