So I have been doing some research I have a 99 GMC with the 7.4L and the temp has been roughly 185 and when towing through the mountains and ac on it jumps to 210 is as high as I saw it go before I turned the ac off. Through my research I hear most trucks have shrouds mine does not have a shroud my question is did they come with one from the factory? If not do they make a shroud specially for the 7.4 or are you guys converting one to use with the 7.4?