Kit includes:1 TRA-650-526 Adapter Plate
1 TRA-656-522 Crossmember Bar with parking brake bracket
1 TRA-650-521 Trans Mount Insulator (2253)
1 TRA-650-517 Drive Shaft Slip Yoke

*Adapter plate requires 1 hole drilled and 1 drilled & tapped into the bell housing.
Early ModelC3AA-6394-C 5 bolt pattern
C5AA-6394-B 6 bolt pattern
C5DA-6394-A 6 bolt pattern
C9OA-6394-A 6 bolt pattern
D2OA-6394-AA 6 bolt pattern

Bell housing modification is required on all original (1964 1/2-1970) and late model bell housings to adapt the Borg Warner "standard" and "World Class" T-5 SROD (single rod overdrive) five speed transmission to an early model Mustang, and to utilize the stock clutch linkage.
The modifications required, when using an original (1964 1/2-1970) bell housing, are to drill one clearance bolt hole and drill and tap a second bolt hole to attach the adapter/spacer plate to it. The spacer is required because of the longer transmission input shaft of the T5 transmission, and also adapts the T-5 mounting bolt hole pattern to the original bell housing.
If you do not intend to use the early model clutch linkage and are opting for a cable installation, you can use the late model bell housing and late model throw out arm as they are, without any modifications required.
Caution note - Always check the condition and fit of the crankshaft pilot bushing, since some T-5's have a smaller diameter pilot. Problems such as clutch chatter and popping out of gear will occur if the pilot bushing fit is not correct.