bill,
not sure if this helps this guy has some stuff adapters and he says he has the reduction boxes too.....i'll be passing by tomorrow and wednesday so if you find something or talk to him i can pick it up for you....
http://cgi.ebay.com/ebaymotors/Chevy-TH400-to-NP203-Adapter-TH-400-NP-203_W0QQitemZ160370198205QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item2556cf06bd[url=http://cgi.ebay.com/ebaymotors/Chevy-TH400-to-NP203-Adapter-TH-400-NP-203_W0QQitemZ160370198205QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item2556cf06bd]
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2006 Dodge 3500 quad cab 4x4, cummins, built tranny, 550hp - 870trg(est.) tow rig
1977 Bronco: 302 fi gt motor, C4 w/shift kit, full cage, fbrglass body, d20, d44& 9" w/trutrac, 2"bod lift, 3.5 susp lift, 35" mt, grocery getter
1992 Toy ext cab, flat bed, 4.3 tbi, sas, 700r4,stock toy tc, d44 w/histeer, toy welded, 4.88
KARNAGE MOTORSPORTS INC