17 A popular option for the Mustang was the in-car trunk release kit. The cable-operated release featured a chrome lever by the driver seat for quick access to the trunk. While the cable version has been reproduced for many years, there has been a new electric release kit available for the past few years. It features a stock-looking lever that actuates a wired trunk release solenoid, making it easier to install. It's available for '65-'70 Mustangs for $99.95.