Do it. It's not that hard. I've seen them last 100k, I've seen them snapped at 62k. THe choice is yours, but I'd REALLY suggest just throwing a $40 timing belt on it.
DEFINATELY interference. Here, this is on my old '02 Elantra, but other than the p/s pump placement the rest is pretty close:
http://www.elantraclub.com/forum/index.php?autocom=ibwiki&cmd=article&id=104
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