[68z302]

I got an email from a guy named John Karvonen with his phone #.
His email says he had 3 68 z/28's so I gave him a call (906 area code).
His '68's were an early build (late '67) that came with the 202 coil & 2 later (June & July) built cars with the 298 coil.
His June built car was made the next week following mine!

That's good enough for me, thanks to John & all who responded