Woodbutcher

Hi all I have a 93 ls400 ucf10r with ecu number 89661-50180 however the ecu is cactus and I am unable to locate another of the same part number done some research and I believe a 89661-50170 out of a celsior will work however I am unable to locate one of them as well so my thoughts are buy one from the same make and model and rewire ecu plugs to suit new ecu can anyone see a reason this would not work thanks in advance