I don't see why you couldn't get TOD to work. The R2 engine uses OBD (not OBD2) and CAN BUS, the same system that's in the VX. All you need is a way to get the engine speed sensor and throttle position sensor to talk to the computer. Might take some doing, but I think it would be possible.

Your probably correct about the adapter plate. They are including a plate for older Jeep, Toyota, International, and a few others. Perhaps one of them is compatible? Don't know yet what all vehicles they are being offered for besides the 3 models they have already installed on for real world testing.