V8 (5.2) swapping a van

Those conversion vans (with the plush interior/seat that turns into a bed/curtains over the windows) are awesome road trip vehicles! My friend use to have a 90s gmc with the 4.3 v6 and it was the most comfortable thing to cruise in. Also if you pull the seats inside, the room for loading stuff is huge. My belief, sorry to the 3.9 believers, is that the amputated 3.9 is a pooch. They get the mileage of a v8 and have the power of a 4cly. 5.2 or even a 5.9 is a great idea if you actually plan to drive it at highway speeds/up hills. If you have access to a junkyard with dodge trucks/vans, see if you can find a complete harness/computer for a v8 one and swap it over!