i posted the same question not too long ago (bout a month) and another problem that you would run into is the door panels dont line up nor do the regular e36 door panels fit (our doors are too long for the sedan panels and too short for the coupe panels) and then on top of that there were some problems that plague the regular dash (saggy glove box) plus they dont look as good in my opinion. if u wanna do it, go for it its your car, customize it how you like
. good luck with whatever yo u do!