I'm converting my '73 240z's flat top carbs to round top SU carbs.  In the process, I'm sorting out, restoring/replacing coolant lines. I found this topic while investigating whether or not to delete the manifold coolant pass-through. But, my flat tops had some other stuff I'm trying to remove if not needed.  See this pic from that thread, with my mark-ups added in PURPLE and GREEN to show flat top elements I'd like to remove.     The green sensor is in the 2nd pi