The 208 isn't a particularly strong transfer case, although they are available.
The strongest transfer case is the NP-205, which came in GM, Ford-left hand drop, Dodge, IHC, etc., both in attached and divorced positions. They are easy to find with lots of variations.
They are CI, so a bit heavier than the AL ones, but the strength more than makes up for the weight, especially on a Bonneville vehicle.
Some truck guys make their own with a roller chain and pillow blocks-very light. For your application you would need to provide a drip oiler.
Ed Pruss
Longmont, CO
