@Stircrazy, yes to the 6L and most LS motors. They are arguably heads and tails above even the old GM small blocks and most other gas engines. I think the one other comparable in durability is the Triton V10s.
To the OP I was speaking stock for stock. As most folks here aren’t interested in mod motors, even tuning. But I agree with you. Hell, guys even slap blowers on high mile 4.8s and run em to the moon and they seem to hold up.
When time permits I have visions of a shortbed squarebody sitting on a GMT800 Tahoe/Yukon chassis. Almost the same wheelbase. Idk how the fab work would go but it would be the ultimate AWD sleeper. And all it would need is bolt on parts and a built trans to run with Hellcats. Hahaha
LS powered old trucks are a true bargain for making big power.