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

Condenser is very close to the Rad. Scoop is open to the under hood area. I don't have the seal on the top of the rad support installed but I do have one in the shed. Maybe I'll try that. The Vacuum advance is disconnected so it shouldn't be too advanced at cruise. Big thing to me, is that if it cools at slow speeds then the cooling system is not the problem.
Thanks for the advice.
Cley