http://www.rollaclub.com/wiki/index.php ... ing_to_RWD
You should have little difficulty finding the AE86 specific parts since they were delivered that way in your market. We didn't get RWD 4AGE's in Australia. Source the correct inlet manifold locally rather than cut and shut.
Don't fall for thinking you can get an early T50 as it won't fit.
If you plan on running a conventional engine driven viscous fan, you must buy a RWD specific water pump.
The main issue you will have will be wiring, if you intend using the factory ECU. Also you will need to install a T series rear axle with a 6.7 ring gear. Not sure if any of your TE27's had these locally, if not you will need to source one from a later model and cut it down to suit leaf springs and narrow it. All the info is out there as it's been done plenty of times before.