I dunno. I just bought an air cleaner off Amazon in Germany. Been obsolete for about 5 years. I was thrilled to find it and would have gladly overpaid for shipping. I thought shipping was very fair. Box overall that it came in was bigger than yours. I think the shipping with the tariff was...
Warning - not easy to install. My restoration guy screwed mine up and I need a new one. This is where I got mine. There was a recent thread on the subject but forget which forum.
https://www.profitautointeriors.com/
I believe that you are referring to the bulkhead connector. The big one in the firewall by the master cylinder that has 3 connectors. This is one of those connectors.
I didn't know it was going into a Fury!
And from the other Forum, my 505 never made it into the car yet. Got derailed during my move to the new house but should get back on it early next year.
I found several linkages that are probably correct for you but the clips are missing. Only found the larger clips. More than likely they are in the clip box in the shop. Wont be in the shop for a day or two but will be happy to look.