Actually, I'm afraid that there is some confusion there, particularly over the CGN-42 designation. What was to become the Virginia-class DLGN was designed as a dedicated escort for those CBGs that were to be built around the CVN-68 (Nimitz) class CVNs, with four DLGNs per battle group, with a minimum of 32 hulls to be procured (originally it was only planned to build 8 examples of the CVN-68 class). From the outset it was planned that this new frigate class would be built around ASMS (what became Aegis), though scope creep began creating some technical & other delays. Though this contributed to the decision around 1967 to have early examples of the new class initially fitted for but not with ASMS, this was not the only, or even primary reason. A major issue was that McNamara hated the CVN-68 class and wanted it cancelled so he that could spend the money on 'his' priorities. This hatred naturally carried over to the DLGN class that was intended to help defend the new CVNs. McNamara routinely raided the budgets of both programs for money for various pet projects of his, causing further ongoing delays and attendant cost overruns. Matters weren't helped by McNamara viewing ASMS as a very low priority program at best, with him even trying at one stage to have it merged with the U.S. Army's SAM-D program. He failed, but the botched attempt hardly helped already stretched budgets and schedules.
The plan with DLGN-42, later CGN-42, was for it to be the first ship in the class to be fitted with ASMS/Aegis, with the previous ships then being progressively retrofitted. In 1976 however with procurement already having rather ill-advisedly been reduced to 11 hulls, CGN-42 was cancelled, with the designation being reassigned later in the year to the Strike Cruiser program. Confusing matters further was that this new incarnation of CGN-42 was initially supposed to use the Virginia class hull as the basis for it's design, though it soon evolved into a new bigger hull design altogether.
