Most RA60's I have seen in Perth run a W57 box. The SA63 had a W55 and I understand that the Corona Avante has a W58 box, along with the might Supra.
You may need, as I have done, to swap the selector fork and top cover plate between W57/W58 boxes so that your gearstick can come up through the original hole in the tranny tunnel, and also (as in the case of my originally auto RA23), modify the g/box crossmember by welding on some extension plates and redrilling the holes to meet the exist captive nuts in the chassis, as the W57 g/box I am using 'moves' this crossmember back the amount of the mounting hole spacing.
Cheers,
Mitch.