I know they are flat lens, what is the correct dates, anything after March of 70? Would the clock knob be the large style or the short one?
I can't answer specifically, as I've not had the gauges out of my GSX. The original gauges for my March (03C) built '70 Stage 1 car are dated 9-69. I'll look at the clock knob in the morning, and try to snap a photo.