Kubes

Hey there, I have a (complete) but totalled off 1991 toyota supra, Right hand drive, 5 speed car that I was going to fix. I also found a mint 1992 Left hand drive, auto sc400 without a motor/trans. So I am thinking of just swapping the motor,trans,wireing etc out of the supra and putting it into the sc400. Does anyone know how hard that swap is, what I all need for the swap and also, how hard will it be to use the rhd supra wireing harness on the lhd lexus sc400. Any Information or links to the same swap would be helpfull.