This Harman combustion blower motor assembly comes with a new motor housing. If your old housing is still in good shape it can be reused. If the screw mounting holes are stripped out on the old housing, simply pull back the wrapped insulation to expose the old housing if it needs to be replaced.
All invincible series require a 5″ double paddle fan blade, part # 3-20-502221, which is not included in this assembly.