I have a 70 Barracuda that was originally a slant six. I installed a 360 with a 727 trans. I have a 26 in radiator with a after market shroud (see photo) I live in So. Calif. On hot days, with or without the A/C on it runs about 180. At a stop light it goes to 200 deg. How far should the fan blades be under the shroud? If I need to move the radiator closer to the fan, do I use spacers? I have about 4 in between the fan clutch and the radiator. If you look at the pic, the fan blades are not under the shroud. Thanks