Ford C6 1967-Up Includes items to restore proper function to Valve body with much improved drivability and durability. Features: This kit will allow you to convert most 1977-up Gas Valve bodies into a Diesel Valve body. Note: When converting a gas valve body for diesel use a .410 or .437 Pressure regulator boost valve must be used . Many gas VB’s have this size. Crisp shift performance and more durability. A wonderful addition to your OEM Classic vehicle. You will love how it shifts. Addresses: Raises overall line pressure. Early or soft shifts, stacked shifts, Bogs on hill, Calibration for a higher speed manual low. Installation recommendation: Experienced technician Transmission removal necessary: No