hmmm... the only shroud/cover type thing is on the bottom.. it is a 2wd!! the kinda v shaped thing.. ya know?? dont know how many core radiater it is... got it from a guy with a company named yodaman and hes kinda like marlin but doesnt make products so i figured it would be the right one. he is also the one who i got the thermostat from.. i dont know what temp one it is.... just assuming its the right one because of who i bought it from... no i did not run it with the radiater cap off for a bit but will try it in a few mins... well ill check all that stuff and report back.. thanx guys!!