Your driveshaft will need to be shortened 1/2"-3/4" and will need the matching slip yoke.
You'll need to run a vacuum line from the manifold to the back of the trans, as well as install a kickdown switch and corresponding wiring.
Earlier kickdown switches mount to the throttle linkage in the engine compartment, and later switches mount at the gas pedal under the dash. The later switches bolt right in.