[BCLi]

Hi all:
I'm in the midst of pulling apart my recently acquired '77 911 2.7l engine in order to fix the myriad of leaks and update. Upon looking at my heat exchanger-less exhaust, there aren't the usual nuts, but a pile of three (see figure). As is usual, I really want to avoid breaking studs, so I ask for the collective wisdom of the group - what's the best way to address this triple threat? One nut at a time after PB Blaster/Liquid Wrench?

Thanks,
Bert