“Oak tree, you’re in my way!”
Not to worry - they assured Ferris that they are professionals.
Once the movie came out the Ferris Bueller car drew so much attention, and it looked so close to "authentic" that Ferrari sued the maker (Glassmoyer and Goyette) out of existence.
It had a Ford 302 under the hood, and because Broderick couldn't drive a stick, it had a slush box.