Housing, PTO shaft: all models originally equipped with 1-1/8" spline PTO or TISCO 1-3/8" conversion. (Note: OEM 1-3/8' housing is #310089 and will not interchange with 9N733B. 310089 is NOT available.) 9N733B$25.14 Davis Tractor Parts Ford 8N Dept 24263 Antioch Rd. Andalusia, AL 36421 Phone: 334-222-7214 Fax: 334-222-0025 Email: parts@davistractor.com