These things are amazing in the snow. With the 4HI selection, and snow tires, it's a beast. It looks like you fixed one of the only concerning factors, the exhast manifold.
Interested in the truck for the Winter.
If it hasn't gone off roading, why the lift, skid plate, and transmission cooler (it already has a Tranny cooler, and skid plate).
Does it shift into 4HI, 4Lo and AWD no problem?