This is interesting:

http://www.ebay.com/itm/1966-to-1979-Mopar-Dodge-A-B-C-E-Body-Car-Truck-Manual-Steering-Box-Gear-Box-/361882567453?hash=item5441e1c31d:g:~PoAAOSwImRYfksk&vxp=mtr

Lighter and stronger than a stock unit? Anyone know of these? $217 isn't bad if it's as it says.