The heater core blew in this Beautiful car i bought and OMG. I have the whole dash laying all over the garage, and 5 million screws laying everywhere. But, my question is. We got down to trying to remove the actual heater core box and discovered the AC tubes also run into there and seem to be holding it. Is it REALLY necessary to break open my AC system to remove that unit? If anybody has experience at this please PM me. I'd really appreciate a phone call maybe. But, messaging here would also be fine.