+3 on no tightening of ball joints, it's not possible. Your uppers are riveted in place and you can drill out the rivets and bolt in a replacement set. It's not that hard if you have the tools, time and patience and a good place to do the work. I don't have a 4WD Dakota but I do know the lowers are pressed in place. You can rent a ball joint press kit at a parts store or buy one cheap at Harbor Freight to press the old ones out and new ones in, or you can remove the control arm in one piece and have a shop do the press work for you. Either way will be a pain to do. But if you buy your own parts and do your own work it would be a lot cheaper. Like $100.00 to maybe $150.00 for all 4 ball joints and whatever you spend on tools and/or a shop to do the work with a press. You will also need an alignment when the job is done. Still cheaper than the other shop's estimate.