I really hope you are joking about using the car to get across over 100 miles of open water.
Unless you have a death wish....i think i would put the car on a ship and send it across. Also the roads in Belize would be hard on the little car. That is, once you get off the paved roads. And there are a lot of dirt roads with pot holes that would eat the car up. It would no longer be a collectable...
But i would love to see the little car with the windows rolled up and the wippers going a mile a minute through the ocean.....(near shore, in shallow water)
you would need to drag a fuel barge behind tho...LOL