Take Five! – Modern Driveline’s Five-Speed conversion package for ’71-’73 Mustangs can be swapped in a weekend Jim Smart July 30, 2014 Classic Mustang five-speed conversions are nothing new, but how we do them is getting better all the time. There are piecemeal conversion kits and there are user-friendly conversion kits that make getting into … Continue reading TECH GUIDE: Simple Five-Speed Swap for Your 71-73 Mustang