I think you my have youre work cut out there mate but things can always be done just down to money!!
I never done it but would say you would need lhd bulkhead (lots of work), pedel set, full dash kit, heater blower, etc etc 95% sure you would need to change or sort out brake pipes and pos master cylinder? then you start with power steering rack and fittings etc etc as on other side what would it fail on?? as if you have oil relocate etc??
LOOK DEEP!! in to it before you start as you don't want lose the love for your supra
if you got a idea of what your after pay £10 gbp to join fully and you will find lots of help on here plus couple of traders on here have fingers in lots of pies and can find some utter stunning cars to all specs for very good money!!