Beater Bird

Get this thing running and take it off jumps.

http://milwaukee.craigslist.org/cto/921264961.html
As an alternative strategy, an old Honda Civic would make a killer low-rider. Ordinary hydraulics should be capable of flipping it completely over. As a jump car, add some Macgyver-inspired wings crafted from a tarp and an old swingset, and it may be flight-worthy. Sweet.

Personally, I'd have a hard time resisting the urge to bolt a small picnic table (for maximum downforce) to the back of the roof and hang a Folgers can under the bumper. Vroom!