Oops. Color me embarassed. Thanks for the direction, great resource there.
the plan is to find the more available 3.38 gears for our '59. Looking over at ricksringpinion it looks like the 3.38 are available, but the original 3.90 is back ordered. Since it was the only place I've looked, I figure I need a couple more 'second opinions'.
If I get off my arse, I will try to put together a bunch of pictures of the restoration of this truck.
Chris