1998 ford windstar
 

we recently did an engine swap in our 1998 ford windstar 3.8 litre, but we discovered a problem with the air flow in the air conditioning and heating unit
we have air and heat but cant direct inside the car except for the defrost setting. What vacum line from the motor controls the vacum contols inside the car and where are they located? Much appreciated if we could get some info about this.