I had 60k on the stockers and the electrodes were "dished" slightly and could have been regapped and thrown back in. But, car ran fine, no misfires. Now its got ~50k on a set of Autolite double platinums and so far so good.
If you're going with autolite dbl. plats, part number is APP764
If you want something a little 'higher performance' the Autolite extreme performance plugs look pretty good. Part number for those IIRC is XP104
I'm gonna try the XP's next time, not that I really need them or think they'll buy me much, if anything.