Unique bellhousing required for Tremec 5-speed transmission M-7003-R58C and M-7003-R58H Fits 289/302/351C/351W engines with 157 tooth flywheel Designed for 1979-1993 Mustang V-8 clutch fork Requires diaphragm-type clutch. With 10-spline input shaft use clutch kit M-7560-A302N Can be used with starter index plate M-7007-B Can be used with clutch linkage upgrade kit M-7553-A302