Sounds like you need a case spreader....Might check around and see if some parts house has one to loan out...
Case spreaders are like a big "C", they have pins on each side to fit into the holes on each side of the housing, turn the screw on the "C" and it will spread the housing just enough to get the shims and carrier back into the saddles ...
Good luck.... "BH"
Poison spider Evap.Skid/Master craft grab handles/Or-Fab spare tire-can carrier/ Gibson SS Duals/ Q-tec Floor Liners/Hidden Hitch Receiver, AntennaX 7inch, 48" Hi-Lift.
Viet Nam Veteran 69-70, Troop "D" (AIR) 3/4 Cav. ,25th Inf. Div. CUCHI RVN. UH-1H Crew Chief of the "Pinball Wizard" 68-16224. Call Sign "CENTAUR".