Traditionally the Cannonball community builds have leaned more towards mechanically possible builds. But this is more due to the builders and their personal standards, than any written and recognized rule. I don't see an issue with what you want to do, but remember there is a builders poll at the end of this, and something cartoony or mechanically impossible would likely not get much attention from the voters.
But if you want a final vote, contact Wagonmaster who's running the CBP this year and get his position.