A 1969 428 Cobra Jet Mustang Mach 1 sat untouched in a basement for 28 years, emerging with just 41,525 original miles, its factory tires still in the trunk, and a sealed bag of unused headlight adapters Tommy Higgins has already turned down $2,500 for. Documentation includes the original bill of sale, build sheet, and a confirming Marti Report. Read on to find out what else survived nearly three decades of dust.