[Dan M2]

UPDATED

Well after cleaning up the engine and tightening all loose head studs, I ran it and found only one oil leak at the rear main seal. Unfortunately it was a very big leak. So after talking with my helper (who is much more knowledgeable than me on 911's) we decided to drop the engine and go for a complete tear down.

We finished the disassembly today and were very pleased to not find a lot of broken bits or tired engine parts. In fact it came with 90mm Mahle P's&C's and a lightened flywheel. The engine does not show much wear at all in fact the cylinders look almost new! I need help ID'ing the pistons though. There also wasn't much carbon build up and the one cylinder with the lower compression (175) had a broken head ring seal.
It does have the original sized valves which seems a bit too small for 90mm cyl's.

Also will need to figure out how to lower the compression. I don't see the need for 200psi.

Lots of pics attached.