Early 66 Cuda/ Valiant badging in 1966

My (and LilCuda's) old '66 was an October 19, 1965 LA built car with fish on both ends. History of the car is known back to 1975.

To the OP. Your car was NOT #81 off the line. That is probably the SO # as the SO# of my old car is 00082. The sequence # on the VIN is closer to the number off the line, but still may not be precisely linear.