Originally Posted by mercmad6.3

Thats not entirely correct. I have both Euro and national model engines here,some are electronic idle and only the early 380's were heat controlled idle air slides.on cars equipped with temp units there is also a idle switch over valve activated by the aircon circuit to increase idle by altering the distributor advance.
As on our friends car here i have found the only Euro's to have heat controllecd airslides are ones that have been bodged to rectify a high idle situation. A lot can happen to a car over 23 years.