Hey guys. I'm currently running a 17.5"H x 25.5"W 3 core, large tube, Champion aluminum rad purchased from Jegs. They offered a shroud for it which I didn't buy, because the shroud was made for a 16" fan, and I am running an 18.5" clutch fan that came from the 1977 New Yorker donor car. My questions is, would I see better cooling from the 16" fan with a shroud, or keep my 18.5" fan and no shroud? Cooling as is only becomes a problem in 90+F when the car is sitting idling, like in heavy traffic. My 440 has a 195F stat, but will get to 215 in the conditions stated above. I'd love some feedback. As always, thank you.