There is no bypassing the electronic control but there are several aftermarket manual shift controllers out there.I did some searching around and looks like both the L400 (A340E) and Landcruiser (A343F) transmissions are electronically controlled and there is no bypassing that.
I'm going to first try the Delica TCU, but if that does not work then I am going to have to go with a stand alone manual controller.There is no bypassing the electronic control but there are several aftermarket manual shift controllers out there.
I would think that the other delica tcu would control the a343f, being in the same family of transmissions as the a340, but i have no experience on the subject. I do run an a340 with a manual controller on my swap, and am pleased with it.
WOWGot my manual shift controller from BrettM here on pirate, I think ~$100, but I don't think he's around anymore. R.DesJardin sells a few different models, PM him if your TCU doesn't work.