I have a 85 4runner with a 4 cylinder third that is bad. I purchased a v6 third with precsion gears and an ARB. Everything I've read say the 4cylinder and v6 thirds are interchangeable. I took out the 4 cylinder third and trying to install the v6 third and I can't get it to fit. Do I need to modify the housing? Thanks in advance for the help

Wilson