Do the smaller displacement engines have such issues? Scoring is almost exclusively the later 3.8 variants. Do they go oval like the early 3.4’s? I thought that by the 54 plates (i.e. facelift) that this wasn’t such a problem. IMS bearings are something that can fail on any variant.
Great handling sports car with plenty of poke in the S variety. Buy with your eyes open as these are getting on a bit, wont be eligible for a Porsche warranty and will likely need a lot of components refreshing to keep it at its best. This could be reflected in a cheap asking price. Have you got a good independent garage or are you handy with spanners? If nothing goes wrong and you don’t need to do any major work on the car it shouldn’t be too expensive to run.
I always understood it to be prevalent on the 2.9s.