Muscle Car/Hot Rod/Racing 2-Wheel Drive 2/3 - Speed Automatic Automatic 3-Speed TH 350 9" Tailhousing. Replaces 9" tailhousing. TH350 medium length, long wheel base vehicles. Install price - $750.00* *Typical install & drive shaft modifications. Does not include any modifications to exhaust, transmission tunnel or any other custom modifications that may be required.