rpm is what kills motors, these guys with the td big inch stuff tend to want to spin them like a little small block and thats why everyone thinks they dont live as long.
Pick a giving ET say 8.00 in a 2700lb door car, its going to take more rpm and pushing the limits for a 540 to 565 to get there when a 582/598/605/615/622/632 would make more hp/tq and you could run it at less rpm and it'll love longer.
The only thing I dislike about a tall deck is the long rod but still buy no truth in a smaller CI living longer then the big CI with good parts in both to start from. 250 passes is when I start to take mine apart and look this year I freshened mine and it looked like new and its 582.