I suppose I got lucky with mine. At 84,000 miles, I'm still on the original clutch and just started having trouble with the slave cylinder. I've been going through oil like crazy (3-6 qarts per 3K miles) for about the last 20,000 miles, varying on how heavy my foot is.
From what I understand, if these engines don't warm up enough before being subjected to heavy load, the cylinders have a tendency to get egg-shaped. One symptom that I've experienced that I haven't seen discussed in any of the forums yet is an accompanying howl when oil is low (even by 1 quart or so). I would think that this is consistent with rings binding and resonating on the cylinder wall.
I first noticed this issue along with a tell tale plume of light smoke (I never understood why people call it "blue") at full throttle after a series of oil changes and a Dodge dealer who overfilled my '04. As it turns out, the '04 has a smaller oil cooler and holds less oil than every other 505. Even though it was overfilled and certainly showed as such on the dipstick, I never noticed any aeration in the oil as I've seen before in small and big Chevys when the crank is in oil.