Newer transmission behind a 239?
No they are just syncro 4 speeds. 5sp OD's are rare and are only with the larger trucks. F-7, and then into F-700, F-750's. There are two versions a light duty and heavy duty. I don't know what make or numbers they are....I've been looking for one for a while. I know that Clarks might work....haven't found any to try yet.