if you are seriously having cooling issues, in Rhode Island??? there other problems with the cooling system, either a weak clutch, or a plugged radiator.
I live out here in Phoenix Arizona, next door to hell,,,mine would heat up with the stock 3 core radiator, bumped the fan clutch up to a heavy duty unit and it helped, but ultimately it ended up being an old radiator problem.
Bought a new radiator and up'd that one to a 4 core, along with that heavy duty fan clutch, it never really gets much over the t-stat now.
BTW, you MUST have a fan shroud for adequate cooling.
My dually has a 4 row radiator, also with a heavy duty clutch, it doesn't have a shroud on it and on these 100+degree temp days, it hits 220-230 EASY until i get rollin again. That's just usually sittin at stop lights.