Same here with no issues, and I have the same car as you. I bought the original kit with no-swivel nipples, and had exactly the same worry as you, because those nipples had longer threads than the originals. So I contacted Cain at Wolf, who informed me that in spite of the longer threads they would not interfere with the king pin, it was measured out to be all right. However, the no-swivel nipples vere of no use as they got in conflict with the damper blade bracket. Looking for a solution, I stumbled upon the swivel nipples. They had the same thread length as the kit nipples, so I supposed they would go in without problems - which they did. Later on I informed Cain, gave him the name of the manufacturer, part number etc. He subsequently incorporated them in the modified kit. So you will be fine with your swivel nipples. And I had the pleasure of contributing a little to the Morgan world....
