SSN, I'm not trying to be an ass (well.... maybe a little) - I'm trying to scare you into doing it before you're oh-so-sorry.
A friend of mine has his break at 140k and now he's screwed... his truck is just sitting there useless waiting for a new motor or some serious rebuilding. If he'd spent an afternoon getting this done it would be fine.
The last belt I replaced we did in about 4 hours.. it's not that big a deal to do.
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Warning! Do not sear the top of your neck hole in the molten lactate extract of hoofed mammals.