Vintage Certification contenders:
Phil Woj's 69 Chevelle COPO was sold new at Lyle Chevrolet and is documented with it's original POP. It is a 38K mile car with it's original engine and rear end. It is a bench seat car with a TH400.
D. Beem's 19K mile Vitamin C 70 Hemi Cuda.
R. Heibbreder's 71 Cuda 440+6 which was Tawny Gold with a Gold Leaf top.
J. Helms' 66 Chevelle SS L78 with a M21 and 3.07 gears. It has 81K miles and I believe the original drivetrain.
J. Benthin's 66 Chevelle SS L78. I think this car was featured in Muscle Car Review in the mid 80's.