Chuck is retired aerospace and lives/lived in Sunnyvale, CA. He created and self-funds his one-man registry, and does get backed up a few times a year. Possibly he's out of town or something. Don't be in a hurry.
I looked in the old paper Registry and that serial # is one of the many 'secret' Panteras where the owner never bothered to register it back in the mid-'90s. So zero info there except the sister car just before it- #2035- was listed as a 1971. Sorry.