Are the 10 spline 203 input shafts still available...

[thatK30guy]

...from GM? If so, what is the part number for them?

I have a 465/203 combo in the garage and I tore them down to rebuild.

The 203 input shaft is way too worn on the splines to be of any use anymore. They are a "V" shape now.

 

[Stephen]

I have not had any luck getting them from GM, we have another place that has built them, I don't know what current supply is but we do have at least one new gear in stock along with a couple used gears in decent shape.
About $165 for the new.

 

[m j]

ouch