I replaced all my mechanical steering linkage and gear box from my 1957 Bel-Air with a Rack and pinion system so I no longer need this part. Supports Power Steering. Very Good condition. No spline or ball joint damage.

Spline count 32 small with 4 master slots and inside diameter of the big hole is 1 1/6. 

I believe the casting number is 370945 GMT6. The 9 (I believe) has lots of paint over it.