Howdy. I have an early 70's SVT. Everything is peachy on it thus far--except the fan on the back. The fan works fine; I'm just not sure if it is mounted properly. There are 4 possible ways to mount the fan: 1. Inside cage and blowing inward 2. Inside cage and blowing outward 3. Outside cage and blowing inward 4. Outside cage and blowing outward. Right now it is mounted outside of cage and blowing inward. Is this right? There is no fan guard (I'm not sure if it came with one), but there is a large, black plastic ring that fits into the fan cavity. Please help!