
I have found 2 of these one is in my 69 k20 and one spare. I used to work at a junkyard in delaware and they had a 1987 chevy 3500 4x4 state dually pickup with a 205 case and 4spd. This is the same spline as the Rockwell. Hope this helps. Look on car-part.com . 65 biscayne ls6 4spd ,70 2 wheel blazer,69k20 69cst10sb,75 monza ,