I've removed the front subframe for easier measuring of the motor adapter dimensions. This subframe is slightly bigger than the one I was using before, so the adapter plate will be easier to make. The gearbox is largely fixed by the driveshafts, once I have that in place I can see exactly how much room is left for the motor. With the motor - gearbox offset and angle I can talk about getting the adapter plate made without any hand waving.