I had a 1989 Ford 460 engine in my rv and the orifice tube or capillary tube was located very close to the evaporator which was up against the firewall on the passenger side. IF and only IF, yours is the same setup as mine was, this piece is very difficult to remove. I bought a special tool for removing it but ended up breaking it. Sooo, I took the rv to the Ford dealer who also couldn't remove it and,as a result, replaced the entire evaporator.