to change m/s needs full strip it will most likely be best to fit new bearings and new outer baulk rings at the same time ,google these parts , tud101270,ftc3584 x 4 ,ftc5018 x2 ,ukc8l,stc1628,ftc248,ftc317,rtc6751,ftc2385,ftc3371, ftc5303 and ftc2383 i have got good used v8 input shafts