Like your Z, this site is always underconstruction. :-)
Weighs 10lbs vs 30lbs for stock dash.
Joe Alphabet patterned it after some old Italian car, I think. It looks pretty good, especially with a wood or brushed-aluminum insert. This dash is the one in Steve Graber's Velo Rossa™. Steve re-used the Datsun gauges, but put new faces on them.
The "Origin" dash is a unique design for the first-generation ("S-30") Datsun Z car. One-piece fiberglass construction is much more resistant to UV and heat than crack-prone factory plastic or after-market dash repair "caps."