Florida to Australia? Well, there have been several T-37's that have circumnavigated, so it is certainly doable with some upgrades to the boat. The big thing is do you have time to work on her before your planned depature?
If the boat your looking at is this one:
http://www.yachtworld.com/boats/1979/Ta ... ted-StatesThen you will need to go over her with a qualified surveyor and tell him/her of your plans, he/she will recommend necessary and immediate upgrades perhaps even prioritize them for you. This particular boat appears to be in decent shape but fairly stock plus the engine has moderately high hours. She looks to have had the portlights replaced sometime in her life and she has a rigid vang and a roller furler, which is a plus. The autopilot on this boat is an older wheel pilot so you will want to upgrade to a below deck pilot like the Raytheon 6000 or the like for voyaging. Potable water on these boats is on the small side for voyaging so you will need to think about extra tankage, jerry cans or a water maker.......all are viable. You will also want to increase your capacity of propane in some fashion if it hasn't already been done.
There was a listing awhile back from Rod Stephens on the upgrades he would do to make this a true bluewater cruiser. This might be worth seeking out. I will see if I can't find it somewhere.
Cheers,
Tom