Need Help With Part Interchange, Steering Arm

[Bmartin]

I found a steering arm on Ebay for 1940-1947 trucks.  It looks the same as my Driver side arm, but is labeled as the right side.  The part number is 596560 and I was wondering if anyone could check to see if that will fit a 1940 P9. 

 

Here is the link: 

 

Thanks.

[_shel_ny]

Edit: attachment deleted. wrong item

Edited January 1, 2015 by shel_ny

[Bmartin]

I believe that is the arm on the steering gear box, not the steering arm on the knuckle/spindle.  But perhaps I am confused.  I though that some parts interchanged, but had different part numbers.  Is this the case or did the part numbers stay the same across all models?  Thanks.

[_shel_ny]

Sorry, you would be correct. I was confused.

 

My book does not give the #'s for the arm at the steering knuckle for earlier vehicles;