Hi Il Ferrone, and sorry for the delay in replying.
Unfortunately, most people have deserted the forum in favour of Facebook, so there are not many people to answer you.
I have no idea what the compression figures should be, but your numbers do seem very low, and the increase with oil does suggest an issue with rings or bore, as I think you are suggesting. However, I don't see that being related to noise.
Excessive noise is most likely valve gear: mine was a worn inlet rocker, almost inevitable if you don't have the extra oiling modification.
I'd suggest you start by lifting the rocker box, and checking the condition of the rocker face.
See my post on that for details.
Black smoke? Check the face on the enrichener plunger. If perished, it will allow excess fuel, especially at low rpm.
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