Welcome Capt'n, jump right in- the water is fine and full of wingnuts who are Seacraft Crazy!!! One tip, bring a thick skin because we love to have our fun.
Anyway, installing an aluminum fuel is the question and you might find this to have a lot of information and possible answers on the subject. I haven't found it to be wrong in anyway yet.
http://www.yachtsurvey.com/fueltank.htm
Good luck, welcome and keep us in the loop!