Ok, I'm not dead lying buried beneath my Firebird.
Due to a hand injury and the cold garage I had to stop working. Since the car is still on the ramp I post the URL of the manufacturer here. It is ramp #6 that I have got.
The sections are bolted together.
https://pkw-rampenmann.de/Rampen-Typen-und-Preise/mobile/I postponed the rear main seal fix ... maybe infinitely. After the exhaust manifold I'll address the leaking atm oil pan. If this significantly reduces the leaking I can live with the rear main seal drops - especially based on effort and (non)success rate.
Yesterday I opened all exhaust manifold bolts on the passenger side - result -5:1 ...
The most forward one broke. However, since the respective thread/hole was not used by the factory and I'm a big fan of originality (great excuse, isn't it) I leave it.
Attached is a picture of the broken bolt. Appears to me as if exhaust fumes reacted with the surface - maybe the reason for the sheared off bolt ( another excuse).
Regards
Oliver