Concerning the relationship between J. Evola and E. Jünger, H.T. Hansen (H.T. Hakl) mentions in his article about J. Evola and the German 'conservative revolution' that there is nothing known about a collaboration between the two. J. Evola did write a book and an essay about the German author (L'opraio nel pensiero di Ernst Jünger, Rome, 1974 and L’Operaio e le scogliere di marmo, Padua, 1977). J. Evola would translate E. Jünger's An die Zeitmauer (Al Muro del Tempo, Rome 1965) and a letter from J. Evola to E. Jünger (dated 17/11/1953) contains a proposal for a translation of Der Arbeiter. Instead thereof J. Evola would write the just mentioned book on the subject of The Worker. E. Jünger happened to be interested in Metafisica del Sesso. Their correspondence dates back to at least 1953. It's unclear if the two have ever met each other in person.
(http://delta-stichting.blogspot.com/2005/06/julius-evola-en-de-duitse.html)
Eventually J. Evola would also contribute five articles to the Antaios journal (initiated by E. Jünger and M. Eliade) :
*Das Symbol, der Mythos und der irrationalistische Irrweg (I,5 (1,1960); S.447ff.)
*Geistige Männlichkeit und erotische Symbolik (III,3 (9,1961); S.283ff.)
*Über das Initiatische (VI,2 (7,1964); S.184ff.)
*Zeitlichkeit und Freiheit (IX,1 (5,1967); S.86ff.)
*Vom Abendland-Mythos (XI,1 (5,1969); S.30ff.)
Not mentioned by H.T. Hakl is J. Evola's review of The Gordian Knot, to be read in English at http://www.new-antaios.net/2011/04/julius-evola-on-ernst-junger-east-and-west-–-the-gordian-knot
The essay L’Operaio e le scogliere di marmo can be found at http://www.centrostudilaruna.it/loperaio-e-le-scogliere-di-marmo.html
A German review of L'opraio nel pensiero di Ernst Jünger can be read at http://www.mail-archive.com/juenger-list@.../msg00367.html
This article compares both Cavalcare la Tigre and E. Jünger's novel Eumeswil http://www.ernst-juenger.org/2009/05/apoliteia.html