<VV> Battery question

[Michael Holifield]

I have in my posession a Delco 557A battery, never been unsealed or acidified.  I suspect that the warranty is now null and void since I bought it in October 1990.
   
  Would the long storage affect it, or can I now acidify it and use it?
   
  Mike Holifield
   
  1960 700 sedan
  1962 Monza coupe
  1964 Monza coupe
  1965 Monza coupe
  1966 Monza coupe
  1969 Monza convertible