I guess it's up to what you feel. I'd rather take the time now vs later. Yes on a 4wd it takes longer, but honestly isnt that bad.

 

Based on what I know about the chain, I like the idea of having a tensioner on the slack side of the chain to prevent chain whip and vibration. But if I open it and it has broken, I will likely opt for a more mechanically simple solution. And if it isnt, based on the minimal data I have, it seems like a bad idea to potentially break the oiling system trying to fix something that very few are experiencing failures with. How many have you seen broken on trucks? Did they have low miles?

 

My personal 5.3 had it broken at 47k, my 6.2 had it broken at 19k, and a buddy of mines truck was broken at 53-55k.
It's all up to you besides the LS2 runs the same style setup as you would be swapping to without any issues. Worst case swap to an LS2 timing chain (30-35.00)
I upgraded to a better timing chain with my rebuild

 

I didn't change mine. Truck had 25k when I did my cam swap. I didn't feel like dropping the pan and mine is 2wd.

 

My truck has 125K on it and Im tearing it down this weekend for a cam swap so I will let you know how mine is holding up. I bought the updated tensioner and ls2 chain though, so I will be swapping those out.

 

Did it on my 4x4, not that bad. My truck is lifted so I only had to drop down the 4x4.