1967 Oldsmobile Toronado.
Only 4 built, never actually went into production...great article here:

Hagerty Media
Barris’ beastly 50-year old Esso 67-X still casts a long shadow - Hagerty Media
It’s enormous. Literally and figuratively. Longer than the current Cadillac Escalade, styled wilder than any modern Lexus, and more eye-catch...
