SR20's are tight fit. Im not saying it wont work but with a stock mani i see a problem, now with a greddy one there might be more room to work. Also if you convert a u joint style or collapsable steering shaft that could free you more room as well. I have a FJ20 in mine and there looks to be a lot of room but it gets taken up really quick.
One more thing to think of would be to convert to a rack and pinion style and that should solve all your issues and it will be easier then a RHD swap. but it will be cool.