help 1984 F-150 in line 6 4 wheel drive manual

Master clutch cyc. My push rob keeps bending and breaking off on the masrter clutch . Appears to be alum. maybe china ? it bend after while then snaps off like a tooth pick. any suggestion ? I going to try and buy just the rob this time, but i took the old one apart, but i cant get the whole rod out . any infro ? thanks