they are 85 and 84.
i'm talking about the entire central box, where air is distributed, with the heater core and all the flaps.
i want to do that mainly because in the a/c car the air duct from the blower motor and the box which it connects to are much bigger so there must be a better air flow.
in my car the air flow is lousy, probably because it's not meant to cope with the presence of the evaporator.
thing is in my car there's poor access from the engine compartment, and the isolating cover only makes it worse, so unless i remove the cyl. head it can only be done from inside the car,