I need some info on the pulley as I have never seen a picture from the other side.
Simply put if these bolts take fluctuating shear loads all the time, then the pulley must fail at some time. Moparbust's sheared bolt is a hint of the future if that is the case. Engine pulleys flying around in the engine bay sounds damaging at best. Is there a history of failure? If not it should be OK.
I just do not know if these bolts are under these loads. If the bolts hold the hub to the outer, with the threads located in the hub itself then they are flexed.

 

Mopar is the only one that I know of that broke a bolt. You don't know if it was over torqued at one time or not. I wouldn't condemn the pulley just because it is more complicated. Even the simple design of the factory MB pulley had issues in the beginning with the rubber isolator decaying and falling out. Mercedes has millions of dollars to spend on R&D and they still make mistakes. LET is real small in comparison but at least they stand behind everything they sell, a lot better service from LET then my local Chrysler dealer who told me they can't replace my inner door panel which is damaged from the factory because they aren't SRT qualified, WTF it's a door panel.
Several people have come up on the forum and were going to make parts for the SRT but then it never happened. At least LET has made stuff and stood behind it. All companies have some teething problems in the beginning, based on what I read on this forum with other companies, I would use LET again without hesitation.

 

I cannot really comment on the pulley with regard to the bolts as I do not know how it is put together.
The pulley is also a damper, so it absorbs shocks by design, if the bolts go from the inner to the outer then the bolts are taking the shocks and movement. If the bolts flex they have to fail sometime, they are not springs. I have to use the word if a lot as I am not aware of the design of this pulley and I see no evidence of a sliding feature that would take the stresses of the screws.
Moparbust broke a bolt and then he put it back in, normally when bolts shear they break at surface level or the head breaks off. Breaking down the threaded hole is odd. Why?

 

That's the part that freaked me out as well................but I will tell you that I will NOT take out another bolt to try to figure it out. lol I've broken many many bolts before at work(with air tools)and they all have just twisted the heads off..........none broke mid bolt and then threaded out and back in place.

 

$20 and five days

 

Glad to hear you are up and running again.
Although it is unlikely that there would be an issue if the trimmed snout was done perfectly, did you have the pulley put on a balancing machine to make sure there are no balancing issues?

 

Belt slippage, didnt you say that you were running stacked pulleys? If so what is your boost, I believe that you still did not have a data logger.

Stacked pulleys load the belt really heavily, like 55 and more horse power, PLUS the load for the water pump plus the alternator plus the power steering unit, your looking at over 70 HP loading. Add to this the reduced diameter of the code 3 which has less surface but more importantly LOOSENS the belt tension.

I had to add a bigger pulley to get back to stock tension overall, just to go down the road. I still got some slippage.

Woody