Craig,
Usally the pan supports the tank. If this is your plan you may need to disconnect some plumbing and wires from above before proceeding. If the tank is empty you should be able to drop the pan with support close by, an inch or two, and see if there are straps holding it up.
Someone out there may have a service manual that they can check and see, but my suggestion is to get one for yourself as you could be far from the forum when you need to know how something is put together so you can take it apart and fix it.
Here is a link to a 1978 owners manual, but this guy has a source and is listing serice manuals too.
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2129602381
Another opion is to look in the vendors forum for secretarial services. They will be happy to send you a manual for a fee. If you are a DIY'er the service manual will save you hours and dollars in the long run.