We know most of the key details of the 2012 Mustang Boss 302 from its unveiling at Pebble Beach last month. But until now, we haven't seen Ford's plans for production quantities. The source of the leak? Borders book store, if you can believe it.

A description for a book to be published next year chronicling the return of the Boss 302, entitled Boss Mustang: The Return of the Baddest Mustang of all Time, reveales that, like the original, just 4,000 will be built each year for a two-year run. Of those, 500 each year will be race-spec 302R vehicles, meaning just 7,000 production Boss 302s will be built over the 2012 and 2013 model years.

We can't be sure if the figures are correct, but the historical homage to the original does fit with the Boss revival theme.

If you can't remember the new Boss' specs offhand, fear not: a fine-tuned naturally aspirated 5.0-liter V-8 cranks out 440 horsepower and 380 pound-feet of torque, while a race-duty clutch mates to the six-speed manual gearbox, sending power to the rear wheels through a 3.73 ratio limited slip differential. Side-pipe exhaust, a stiffer and lower supsension, upgraded  manually adjustable shocks, and more aggressive electronic stability and traction control systems improve sound, handling, and, for those not quite ready to unleash the full potential of 440 horses, safety.

Check out our preview for the full details on the new 2012 Mustang Boss 302.

[via MustangsDaily]