by Jim Smart Thanks to MODERN DRIVELINE (MDL), a TKO 5-speed upgrade for your 1955-’57 Chevy is just a weekend away. MDL enables you to move quickly on this conversion in a weekend because everything is available in one spot. We found the installation to be straightforward, void of unexpected obstacles and delays. No special modifications were required to the body or chassis and the TKO-600 slid right into place. We also opted for the MDL hydraulic clutch conversion kit, which is a logical upgrade for your TKO-600 retrofit because it offers light pedal effort and crisp function.