I do wish people would do some research into why thermo fans are used in automotive applications.
The main reason is to remove some load from the engine. BUT, if you simply wire the thermos up so they are on all the time, then all you have done is move the load from the water pump (viscous fan location) to the alternator (additional electricity needs to be generated to drive the fan(s)).
It is also not necessary to set the thermostat for the fans to around normal operating / thermostatted temperature. In general, the movement of the car forces sufficient air through the radiator at normal road speeds to keep the temperature of the coolant under control. Only in stop / start type situations does the coolant temperature rise above thermostatted temp, but there is absolutely no danger in that under those conditions. Once the car gets moving again, the coolant will return to normal operation temperature. So, it is not impractical to set the thermo fan switch point to 90 or even higher.
In a Skyline, with the A/C radiator and probably a FMIC, it is not possible to mount a thermo fan in the most efficient "push" position, and you need to mount it as a less efficient "pull" setup.
All that being said, my experience is that the design of the front of a Skyline does not allow air to be forced through the radiator while the car is in motion. I have had much better temperature control when the factory viscous fan is fitted, because it creates a permanent air flow through the radiator.