Dropping big engines into small sportscars is as American as apple pie, but the British are equally adept. Proof came yesterday in the form of the Aston Martin V12 Vantage, revealed ahead of its pre-production debut at the Geneva Motor Show. Only 1000 examples will be made, but unfortunately none of them will be making the transatlantic voyage to these shores (not legally, anyway). After speaking with a member of the U.S. Aston team last night, we discovered there are some problems with the overstuffed front end passing U.S. crash tests, and the airbag-less optional Alcantara-wrapped carbon-Kevlar bucket seats are completely out of the question, making the Nardo-verified 190-mph supercar persona non grata on these shores.