A 2020 Ford GT Mk II is headed to Mecum’s Indianapolis auction, scheduled for May 13-21. The Mk II is a track-only version of the modern Ford GT supercar. It wasn’t built for racing, however, as it doesn’t conform to the rules of any race series. Production is limited to 45 cars priced at $1.2 million each. Mk II upgrades include more power (for a…