Sure as heck, there were the three little "keys" that you mentioned. It only fits one way...thanks for enlightening me, (and Elmer)!
that's the same w/ my 3104.
while you're at it
do this:::::::::::::::::::::::::
UPGRADE Pittman Arm: Steering Arm: Drag Link: Tie Rod
HINT ::
it does
NOT hurt to use anti-sieze on the spline B4 you replace the Pittman Arm.
http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=22;t=003275;p=1#000000
http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=2;t=010887#000010