usually not a lot you can change on a straight axle front end, especially camber unless you go with offset ball joints. Caster and toe are the only adjustments available without extensive time involved. That said .25+ toe will provide a better driving experience on older ram trucks at the sacrifice of a little tire wear. Another thing to "try" is to swap the tires side/side and see if the pull changes. Might be a tire issue. Think my 2500 4x4 has a slight drift to the left iirc.... can't remember for sure, it's a truck and wears the tires great so it doesn't concern me.

...If you want the wheel straight loosen the adjuster sleave on the steering link from the pitman arm to the tie rod assy. Give it some twists with a channel lock and you can move the wheel. It won't affect toe setting.