Only have 50K miles on my 10 year old Ford V10. Oil analysis has been indicating minimal metals and other such wear indicators so I would expect to see at least over 150K before needing some type of major internal attention. Been on a few Ford truck forums and owners there are reporting 200K plus and still going strong. Not quite a direct comparison when you consider rolling weight but something to consider.
What I would consider high mileage for a gasoline power train would 10K miles per year average. In general the chassis and power train will probably outline the house built on it.