I ran a standard full size blanket on my old pump gas BB stroker Duster, I had a tranny temp. gauge in the car and ran both a 10 inch and a 8 inch converter in the car with a small external aluminum tranny cooler mounted in front of the radiator with no fan or running it through the radiator, it never got above 200 F, never
That car weighed 3450 lbs. with me in it and ran 9.99 in the 1/4 mile through the exhaust with the air cleaner on motor only using 91 octane Oregon non ethanol pump swill
Not all converters are the same so please keep that in mind, monitor the tranny fluids temps. so you know exactly what yours is running