1966 Barracuda radiator shroud / cooling questions

cosgig has exactly what you need !!

You have an air flow problem at no/low speed.
Shroud makes sure all the air the fan pulls comes thru the radiator.
Fan clutch lets the fan slow down when max air flow is not needed.

Electric fans draw a lot of current and without a shroud will not blow/suck much air thru the rad.