You are straining at gnats. At the time of release of the 9600, when the referenced CD was made available (4 August 1997), there was no Mach V (Kansas) logic board, which was always a later and minority variant, available. There is no rubric on the CD to the effect '... except the Kansas boards, which we shall release later'.
The 9600 (Tsunami) booted into 7.5.5.
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