bat443 wrote:…..The A185F (1973 and newer) and 180J and 180K (1973 and newer) require both the rudder aileron interconnect and rudder centering springs, which are included with the factory float kit or ski kit, when floats included on the Type Certificate are installed. ….the rudder aileron interconnect which is located at the station 65.33 bulkhead (aft door post) under the floor....

Reviving an old thread....
I recently had a chance to look inside the tail of three different 3-window C180s with float kits.
Spotted the rudder centering spring apparatus in back, in fact one of them (incorrectly) had it still hooked up.
(all three airplanes were on wheels).
But I've never seen this aileron/rudder interconnect.
I was gonna ask where it's located but Bat saved me the trouble.
In case I don't get the chance to look inside them again, or if they're too old to have them,
can someone post a photo or maybe a scan / photo of the apparatus from their IPC?