I was able to find the problem – the part I ordered had incorrectly cross referenced the Jaguar part number. Once I was able to find the original Jaguar part at Moss Classic Jaguar (which had only listed the part under the later 4.0 5 speed cars) I was good to go!
Dear Bleasie,
The elusive number on my cabriolet is 1143. It is an 86 3.6 5-speed (vin 126155), one of the few “gray market” 3.6 cabriolets that made it to the United States. Please let me know if you need any other info.
Thanks, Tom