and also...we put a Redhead steering box on Schulte's truck and the POS was trashed after 30k miles. I still say that the best replacement for your money is a used low-mile factory steering box from a junkyard.
IMO no "remanufactured" steering box to date has proven that it lasts as long as a "factory new" unit.
Its pretty hard to find actual "NEW" factory steering boxes. If you go to the dealer or any parts store, they will give you a remanufactured box.
What would be the ultimate badass setup would be to retrofit a 2011+ HD steering box. They have a quicker ratio (I think its 16:1, the 2010 and older HD boxes are like 20:1 or something???), much bigger/stronger. Unfortunately it wont bolt on to the 2010 and older frames...so you would need an adapter plate and some custom fab stuff.
Supposedly PSC was working on a 2011+ steering box retrofit kit, but they kinda shelved it due to the fact that they felt no customers would want to pay as much as it would cost for the kit.
Ben