I'm looking at getting a little more out of the top end on my rig as well. I found a unit called a "Brownie" auxiliary tranny that I'm unfamiliar with. It supposedly has a gear under and two over? It has the tranny,linkage,and two cross members looks like an easy addition to the rig.Also has a better drive line brake than the truck has now. I can get it for $300. It seems pretty period correct for the truck. Any opinions on this style of overdrive?
The NV4500 does sound like a nice choice,but I have not seen them that cheap around here.
