Welcome, read up on the TM's to get familiar with what you are getting into. I like this one to get started..
http://test.steelsoldiers.com/upload/M35/PSMultifuelOperator.pdf
People will tell ya all the time to use the search feature before posting a question. Allot of times people run into the same issue which has been covered like a hundred times, so some people get bent out of shape when they see a new post like "What kind of fuel can I burn in a deuce"..
If you get a little familiar with the TM's (technical manuals) before you buy your first truck you will be a educated buyer and will help you avoid being stuck on the side of the road..
Best of luck!