[350HP930]

Way too early in my opinion. Either the owner was ripped off by a shop telling him he needed it or something got FUBARed prematurely.

I got mine past the 130K mile mark before it really needed an overhaul and mine was both modded and ridden hard.

On the subject of ring land damage, it should be fine unless its suffered from a lot of detonation. My P&Cs are still good enough to reuse with that many hard miles on them. The problem with that could be that if it did suffer from a lot of detonation and they didn't go through the bottom end as well you might have to worry about the rod bearings being compromised.