is it possible to con vert an ej 20 in to a rear wheel drive car and keep it rear wheal drive something like a holden gemini

 

yes, you take the center diff out of the transmission, then strip out everything that is inside of it.
Take the top plate the housing and the 'disk' with the gears on it and set them aside.

take the top plate and the 'disk' and weld them together.
then weld that assembly to the housing. and you now have a RWD only diff.

Ninja edit.... check my posts for the pictures of my center diff

 

or....

you can actually get this center diff that this one company makes that replaces your actual center diff, and this will allow you switch back to awd if you wanted to. let me know if you want to get this unit. we can actually order it for you.

 

true, but considering that you can buy another stock diff for around 75$.... its worth it. and if you can weld its even more worth it.

 

so how do i get to see some pics of this i just want rwd in a totally different shell something little how much horse power does an ej20 have standard