A source for the definition by Evola (about the Typhon-Jehovah identification) has been probably also Plutarch, who says that Set, the name of Typhon in Egyptian, means "something turning and wriggling incessantly, and always transgressing the law" (De Iside et Osiride, 49). It sounds little like us: Diaspora and wandering Jew.
Osiris, forerunner of Christ, is not just a solar god, but on the contrary, as Plutarch says: "Typhon becomes the solar world and Osiris the lunar one" (ibid.41). This confusion could explain the patriarchal-tyrannical side of Jehovah. Plutarch identifies Osiris with Dionysus; Osiris is the sun, but only the one at midnight, while travelling in the underworld and destined for the rebirth.
By the way, this confirms the Egyptian roots were solar and lunar meanwhile (two kingdoms and crowns, hawks and vultures, and maybe two races); I doubt this idea can be applied to the first Christianity, but it's an open secret as for the primordial Rome. According to the legend, the Gens Julia comes from Aeneas, son of Venus and her high priest Anchises, and Romulus was son of Rhea Silvia priestess of Venus again, and of the god Mars. A confrontation between Aryans and Pelasgians could be seen in the legend of Romulus, who won the twin Remus watching more vultures flying in the sky. Afterwards, this typical symbol of the Egyptian Queens, the vulture, became a solar eagle. An affinity to Aesir and Vanir in the Edda has to be investigated.
As for Saturn as counter-part of the Sun, I think that it be a late codification. Italy was called "Saturnia Tellus" because Saturn was the wise king of the Golden Age. After, the Christians even invented a Dialogue between Solomon and Saturn (in "Literaturas germanicas medievales", by J. L. Borges) and the Renaissance has been the finishing stroke.