like i was sayin to you the other day mate, find out how much you could sell the Evo for. If it's worth doing it and selling it, could look at a later model modded Supra? would probably strip a few mods off your supra though, e.g. the wheels and sell separately.
i've not thought about prices and i've no idea how much an 02 Evo 7 goes for, but look into it
the other thing to think of is why does he want to swap