In 1972 or 1973 Lt Col Delbert Jabcobs authored the "Surprise Attack Technology Prototype" paper. In it he describes what is almost certainly the "Surprise Fighter"
Stevenson, in "The $5 Billion Misunderstanding" quotes portions of the paper:
I am uncertain in what capacity Jacobs authored the paper, and wether it was a proposal or a description of an existing program. He later worked for the F-16 and F-15 SPOs, and in 1979 made Brigadier General. In 1983 he retired from the Air Force and took as position at Northrop as the program manager for their ATF proposal.
I have so far been unable to locate a copy of the "Surprise Attack Technology Prototype" paper. Based on the above though it does seem that the "Surprise Fighter" had at least some air to air role.
It also appears that the "Silent Attack" paper may have triggered other reduced observable efforts, including the USAF visual signature reduction / optical countermeasures efforts of the early 1970s. It also, clearly, served as the inspiration for Myer's "Harvey" concept (which was a dead end).
The "Silent Attack" design was almost certainly a Navy program. At the time of the "Silent Attack" study the Navy ONR was conducting similar studies with other contractors (McDD, Boeing, Lockheed). The McDD "Quiet Attack Aircraft" was one of those studies.