110 IN THE SHADE closed on Broadway in 1964 before its 2007 revival. That's 43 years.
FUNNY GIRL closed on Broadway in 1967. If done in 2010, it'd be a gap of 43 years.
So those two would tie. Can't think of any other shows that have had longer gaps in their revivals...
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle