Lunchtime on the picnic table!
Engine out (to do clutch & oil pickup)
Knipex can undo anything.
Down to the rivets.
Huh, OEM downpipe was totally broken off at the cat. Only held together by the heatshields.
O2 sensor installed in new exhaust:
Engine pulled, clutch done, oil pickup replaced, and engine back into the car & mated with the trans... in one day.
Alternator, oil, radiator, exhaust, ecu reflash and we're ready to turn the key