I didnt know they made a 3rz mount. I know they made a 5vz mount. But really the mounts were the easiest part of the swap. Just bolt yoor motor mounts to the motor,bolt it the tranny, set the engine where you want and make some cardboard templates for your mounts and either cut them with a torch or plasma and weld em up. Or take the templates to a shop or steel yard and have them cut them for you. Then maybe little grinding and welding and your done.