1966 6 Cylinder T-5 5-Speed Conversion Kit

1966 Mustang 6-Cylinder T-5 5-Speed Conversion Kit

Transform your classic Mustang’s drivability with this complete bolt-on T-5 5-Speed Conversion Kit from California Pony Cars. Designed for 1966 6-cylinder Mustangs (and 1965 models with bellhousing casting C6OA-6394-C), this kit delivers modern performance while preserving your car’s original fit and style.

Compatibility & Fitment

This kit is explicitly engineered for:

• 1966 Ford Mustang 6-cylinder manual transmission models.

• Also fits 1965 models with bellhousing casting number C6OA-6394-C.
  If you’re upgrading from a 3- or 4-speed old manual or simply refreshing your drivetrain, this conversion brings modern transmission feel while retaining your classic Mustang’s factory mounting setup.

Features & Benefits

• Complete Bolt-On Kit: No hunting for bits and pieces—everything required for this swap is included.

• Easy DIY Installation: Designed with the classic Mustang enthusiast in mind, making the upgrade approachable for home mechanics and professional shops alike.

• Enhanced Drivability: With the 5-speed transmission, your shift patterns become smoother, acceleration more refined, and highway cruising more comfortable.

• Improved Fuel Mileage: The modern gearing reduces engine RPM at road speeds, which can yield better fuel economy and less engine strain.

• Authentic Fitment: Specifically engineered to match the original OEM bellhousing and crossmember geometry—so you preserve your car’s factory mounting points and frame integrity.

What’s in the box

• Transmission adapter plate for T-5 conversion (TRA-657-627)

• Transmission crossmember bar (TRA-656-522)

• Transmission insulator mount (TRA-650-521)

• Driveshaft slip yoke (TRA-650-517)
  All crafted to slot seamlessly into your 1966 Ford Mustang (and applicable 1965 models) architecture.