Filed under: Ford, SEMA Show, RacingJack Roush is involved in a variety of enterprises, several of which involve building very fast Ford powered vehicles. His Roush Engineering business also does a lot of prototype build and development work for its client companies. Most recently, Roush has been building propane-fueled conversions of Ford F-150 pickup trucks that are especially useful to fleet customers. The latest project from the racing legend is a new drag racing Mustang fueled by...