Some years ago I bought a nice US spec Ž77 911S which unfortunately came without any papers or documentation. Through some amateur detective work, but mostly luck I have stumbled across the former owner and he had a pile of invoices from the owner before him. This is great news for me, since I like to know the basis of an engine before optimizing it (long term plan).
The invoices indicates an owner who has not worked on the car himself, but used three different garages for any small issue that has occurred. I guess that is a good thing. Most of the invoices are legible, but the biggest and most important for me is hard to decipher. It seems like it has gotten a new engine case, rod (possibly plural), something about piston, machine cylinder head, replace valve seals, and something about original valve (see 2nd paragraph)?
I would love to read words like time certs, but I do not find anything indicatingt that. Would not that be a common upgrade in 1999?
I know that these engines love to pull the threads on the head studs, especially the US models with the hopeless thermal reactors, but wouldŽnt it be over the top to replace the whole case for that?
Are there any other possible incidents that can be read from this elusive invoice?