1000 RPM PTO Shaft
CTPA-72221857 Replacement Part to Fit:  Allis-Chalmers For Models: 5670, 5680, 6670, 6680, 6690, 7600, 7650, 8610, 8630 21 Spline, 4.780" Long  Price:  $103.15  Buyers Club Price:  $92.83