Clutch vs. Electric Fan

I live in the tropical hot northern part of Australia so we get pretty good at solving cooling issues.
On my 440 1969 barracuda I run two 16" electrics.
One pushing.
One pulling.
They are mounted on opposite sides of the rad to get maximum coverage.
The puller is thermostatically controlled and copes by itself much of the time.
The pusher is manually operated by an on/off switch in the cab and is used when really hot,prolonged idling,etc and it copes fine.
Might be an easier,cheaper idea for you to try?