Some better pics of the shocks. 
I believe these are from the 8300 series. They are adjustable at the remote reservoirs and on top of the shock. The first pair measure 17.5" open w/ 4.5" of stroke, or 13" compressed. The other pair measure 16.5" open w/ 4" or 12.5" compressed. This measurements included the bump stops (roughly 1").
My apologies they are a bit dusty in the photos.
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Andrew Schwerdtfeger, on Flickr
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Andrew Schwerdtfeger, on Flickr
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Andrew Schwerdtfeger, on Flickr