On a side note, check this out:
http://www.drag-city.com/track.htm

Altitude Correction Factor: 2,100 ft
To convert your Quarter Mile Elapsed Time (ET) and MPH to sea level times, multiply the applicable factor by your ET or MPH. ET = .9757 MPH= 1.0255


Theoretically, that would put my 'average' times at 13.95 @ 101.0mph (with 'spare tire delete', etc), and my best time at 13.73 @ 101.8mph...!? Yipes. And Firebird is up higher than that correction factor above, my GPS said 2700'. Hmmm! In street trim, with back seat, spare tire, etc my times would correct (using the same 2100' formula above) to roughly 14.10 @ 99.9... I wonder how accurate the correction formulas are though.