I know there are several Vette owners who post in here so...I am putting together most of this car and I did not take it apart so that is a real challenge. Anyhow, I am trying to install the heater core, blower and a/c box on the firewall. I have mounted the engine side part of the unit and am trying to install the inside part. What is confusing me is the position of the heater core inlet/outlet tubes. Should they be pointing down? Doesnt look right to me but I cant seem to see any logical place for them to fit thru the firewall. I am sure I have the correct heater core in there but is it possible that I put it in upside down? Thanks.