I am three days deep into blower motor replacement, going slowly, taking my time, tidying things up a bit. A thought has occurred to me. I have no need EVER for the heater and I would be operating the A/C in recirc mode always. I'm thinking, for the sake of efficiency and reliability, I could permanently rig all the diverters to their proper positions (blow out the front vents) and cap off the vacuum system at the manifold. The only thing I am not sure of is where would I rig the fresh air/recirc door to close off outside air from coming in? Is it accessible from where I am at now or will I have to go deeper into the heater core area? Anybody have any thoughts on this?