Start here: http://www.steelnavy.com/essex_data.htm
Listing of all the Essex Class carriers and basic info about differences, armament, colour schemes, refits, air groups etc. throughout the vessels' service lives.
Edit: PS: Once upon a time, Revell had a kit of the Intrepid - however, this one dated back to at least the early 1970's or older. A far better starting point may be the new Dragon Essex kit.