- These cars did not come with a fan shroud, is a universal shroud worth trying?
yes, as Jacob notes, shrouds can GREATLY increase cooling efficiency.
as i've noted before, 800 hp NASCAR Cup engines get all of their cooling needs accomplished through a grille opening that's about 3" x 16". if you can't keep an idling 215ci cooled down there's a major problem somewhere in the cooling equation.
you'll note that the heating problem goes away as soon as you start moving. that's an indication that the fan clutch is failing and / or that you're not controlling airflow very well.
i'm assuming that you changed the fan clutch out when you put the 6 blade on.
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)