6K/8K Tach

[ZLP955]

AFAIK, the 6k/8k tach was also used on the solid lifter BB engines as well as the Z/28. I looked up the number on the rear of your tach and the February 1969 P&A Catalog lists 6469780 under 9.750 Tachometer Assembly as:
'69 CAMARO w/console gauges, speed warning (302)'
So, if I read that correctly, the tach you pictured is Z/28-specific, although I believe that the original assembly would have included the harness, filter etc, so the difference between it (6469780) and the non-speed warning Z/28 and L78 version (6469383) may lie there, the assembly, rather than in the tach head itself.......