This may help:
http://www.dietersmotorsports.com/tech/tech9-03-2003.htm
The tank has a release valve on top of the tank, it takes some fiddling with to get to it; remove your dipstick, oil cap, and anti freeze fill cap [you are familiar with that by now]. Under that little plastic plate is a bleeder valve which has a ring on it, you lift the ring to allow the air to escape.
If I missed something, someone will correct me.
Sorry I don't have Pic's right now for you, if you really need Pic's let me know. I have a spare tank and can shoot it for you.
Scott