Road Runner Nest

I have some parts for the strato-vent option. I have the controls, cables, upper vent on the dash and the part that goes from the heater box to the upper vent. My question is, Does the strato vent option have it's own heater box or is it a regular non A/C heater box.

It is a different heater box

Larry

Thanks. I guessing this is going to be a hard one to hunt down.