Chevelle P-O-P questions

[Norm reynolds]

Hi I have been in the side lines reading all the interesting forums and have two dumb
Questions #1 what is a P-O-P plate
#2 how can you tell a real yenko
yesterday I was walking my dog around the block and saw a 1968 chevelle maroon with white vinyl top had white yenko strips on the sides a large syc on the hood and 427 on the right rear next to the tail light
the car was beat and looked as it seen better days kept thinking if this was the real deal why run it in to the ground
thanks Norm