OK....another decoding question.......
SO 0407 = Scheduled assembly date April 7, 1964.
Number 3378 = order number from zone rep to Chrysler Detroit.
V49 = Valiant line Barracuda.
P5X = Premium interior bucket seats, black interior
Pnt KKB = Paint
K = Body color Turquoise
K = Roof color Turquoise
B = upper door paint black.