so whats the diference? my legacy has been converted to rwd, properly, locked centre diff, removed front shafts, custom front hubs, etc, my original diff blew and now I have another r160 in it that my mechanic freshened up (new seals, shims etc) and it seems to perform like a lsd should, locks up nice and quick under acceleration etc and has lasted well under the abuse it has recieved. I have been told I should get a r180 diff, what diference should I expect from a r180? failing that, how much would it cost me to get parts/labour etc to do a cusco conversion like loren?