No kickdown linkage?

Heck at this point we don't even know if anything required is missing or not.
Pictures at the drivers side of the engine and down the firewall behind the motor and pics at the trans linkage on the trans itself and we might find out something.

Beat me to it. :D
If it shifts 1-2-3 automatic then it would pretty much require the TP assy.
It shifts up through the gears automatically real fast and early right?

I have to agree with the cable recommendation because finding and putting the right parts on that are going to be a PIA.
Especially since it would all change when you change motors anyway.

See if the top of the two levers is on the trans also, as you will need that even for the cable setup.