I dunno - the inner seals just sitting for that long?
I'd at least look to replace the rubber bushings at top - they're rubber. They'll dry out just like a tire.
I guess I have to ask the usual question - what are you doing with it? If it's a driver, I'd recommend new shocks with "fresh" parts. If it's a show car, then NOS by all means.
Just my opinion.
Jeff