I think there was a thread on it on celicatech.net ages ago. It can be done. Ratios will be shorter, and the box will not be as strong as stock. It has been many years since I looked at this, but I think you might need to hyrbid the 185 and rav4 axles.
Looks like the wayback machine didn't archive their site. It may be lost for good. You may find hints of the info on here, but I can only think of one person who used to post on here who used one in their rally car. Good luck.