How big is the oil cooler ?
If you have time and really want to and the oil cooler isn't to big you might get 2 fans in there like mine

There is also a small 4inch to work as per normal by the engine lid sensor. At least there will be some circulation.
Also the OEM car fan computer there is a pin number 8 which if you connect an earth it will bypass the sensor and turn on the fan.
My fan on the oil cooler can always be on because its the SC cooler and the colder the better but my MoTec turns it on at 55 degrees.
If you have a fan it will have a predetermined temp range to turn on so reall there isn't much fan movement in your bay. Being a turbo i still would want a fan.
BTW are you going to use a aftermarket ECU ?
If so see if it can handle a wide band knock sensor.
Its Toyota part
Wide band OEM knock sensor

and do check your fuel line before you put the engine in.
Last thing you want is a leak
Also we checked that we had no fuel line leaks :)