Have you checked out the HDT forum on the Escapee's site: HDT - Escapees Discussion Forum
There are a couple of sticky topics there that might help. Read through the HDT FAQ and the Resource guide. Good luck.
'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio