I have a 78 E Series with a 302. Where can I go to find a diagram of how the alternator mounts to the bracket when I( also need to mount an air pump. I have the bracket mounted to the block and the air pump is mounted but the alternator isn't matching up. Please help!

This may help. its from F150:

http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/0a/5b/4c/0900823d800a5b4c.jsp