Mark, as mentioned above, did you try to start it n neutral as well as in park? If not, try that first. Also check to see if your reverse lights come on with the shifter in reverse(parking brake ON, of course).
If still no go trying in neutral, try tilting the steering wheel all the way up, and all the way down with the key in the "Start" position. Sometimes a little play in the tilt wheel mechanism can keep the linkage from fully pushing the start switch. If it will crank moving the tilt up/down, you'll hafta crawl up under the dash and adjust the ignition switch.....what fun that is...NOT!
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Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"