Yes, and it wouldn't take very many modifications to the truck, because the 3.9 is basically a 5.2 with two less cylinders. So the mounting brackets would be very similar if not identical.
Need to know which part you want to swap.
Yes, just be sure to swap the tire pressure sensors if you want the warning light to go out.
i want the diagram for installing a fanbelt
just want to put the 5.9 in the 5.2
Certainly, but you'd have to mate it to the Dodge transmission (or, better yet, swap in a 4L60E, since Dodge's transmissions are trash), and you're going to have quite a time getting the electrical to match up. If you want a 4.3, either buy the one I'm selling or get a GM vehicle with one. The swap you have in mind really wouldn't be worth it.
10w30 motor oil. Your choice on brand and if you want synthetic or conventional.
Maybe you need a jump start
You have to specify which relay you want. Some are in the fuse box in the cab. Some are in the Distribution block in the engine compartment.
If you want trailer brakes you need a brake controller.
Instument panel replacements are more difficult than most. You may want to try to get your hands on a service manual for that vehicle or spend some time on a dodge dakota chat board. See sources and related links below for bulb information.
If you want to swap you go to the puppy hotel and hit "swap". Select the puppy you want in their care and then tap the one you want to take home. Or buy a puppy from the kennel and if you do not want a puppy anymore donate it at the hotel at the bottom.
Sure you can change engines, but the question is, should you? IMO, that answer is NO! If you want a Dakota with a larger engine, then sell this one and purchase a different truck. You will more than likely be money ahead, and avoid all the problems of an engine swap.