I am in the Akron Ohio area.

I do not think it will be an issue, the radiator is very exposed to airflow and I am putting the fan in a shroud which should be sufficient when sitting at lights and slower speeds etc...I used to have a similar set up in a 68 Camaro (406 cu in 575 hp 4.11 gear no overdrive) and drove it everywhere in California without issues.

I also think it will sound awesome with the 109-110 lobe center cam. Looking forward!