Would my dual snorkel scoop be affecting my cooling at highway speed?

Yea, but the Dusters came with the Dual Snorkel scoop from the factory unsealed. Do you have the two 4 inch holes cut out in the back of the scoop, or do you have the triangle part cut out?
The open scoop concept might work just fine on a factory /6 or 318 but this guy has a 360 that probably produces more power and heat!!

Treblig