sometime waiting for a reply on this forum, is a bit like waiting for a bus, two come along at the same time.JimP
Depending on the age of your Caravan, if it has a 30Mb Bulkead mounted regulator, then you only need to replace the Pigtail with the relevant Bullnose type for Propane. If however the regulator is a cylinder mounted type, then this will have to be replaced too,
best regards, Martin