you have pictured the EARLY 40 perch that is used with the early sway bar. The early sway bar did not work well and was replaced in production and service with the more typical later sway bar. The early style has a lot or parts and some are pictured in the green book on page 96 (top). Ford recalled all the dealer stock of early parts for a credit and melted them at the Rouge, so they are very hard to find and very difficult to put together a complete early sway bar system. What you have is correct in part. Unless your doing a restoration I would suggest you change over to the later style, since the early style could have been replaced by a dealer in 1940 as a warranty complaint issue (noise).