The shop that did the engine replacement is where it is at now. They put the pulley back on after it fell off last time. They called me today and said that the bolt broke this time, and that because it is a known problem with these trucks they are not covering it.
That seems REALLY wrong to me. They took the old engine out, put this engine it, AND put the crank pulley back on when it fell off last time. They claim that since they used the old bolt and crank pulley from my old engine; since they weren't new parts failure was going to happen sometime. It seems to me that regardless of whether or not they used the old stuff, they had ample opportunity to see a defect it one of the parts and replace it. I think they didn't get it on properly the first time, and when they "re-torqued" it the second time, the pulley didn't get seated correctly...which the Mitsu dealer in town tells me, is ESSENTIAL.
Now; after giving this shop almost $6000 to this point, they said it's going to be close to 1000 to repair it again. The manager said he'll talk to his boss tomorrow about the situation; but his mechanic has installed hundreds of crank pulleys and always is real carefull. So of course, it's impossible he did anything wrong.
Justice, to answer your questions...I don't believe any of that was replaced. I know from looking myself that the crank pulley, crank pulley bolt (was on my skid plate when the pulley fell off last time), and the timing covers were not replaced with the new engine.

WHAT DO I DO?
Am I the only one that thinks the shop should pay for the repair?
If I end up needing to get a lawyer or something; what should I ask this shop that could get me some evidence? (i.e. A procedure they might have missed or something.)
If they do the repair; what should I demand they check/repair/replace?

I'm sorry for the long rant, but this is very frustrating.
I appreciate any help/advice ya'll can give.
Shawn