Who was making ignition insulator on valve cover

I bought these covers a year ago and they were advertised as 1968 340 covers. Are they
The wire loom attachments on the covers changed through the years but I could not tell you what a 68 should look like.

I can get you photos of my 67s

67 pass side
Forward wire loom
PXL_20231011_204403786.jpg
Rearward wire loom
PXL_20231011_204409381.jpg

Driver's side no wire loom

PXL_20231011_204429089.jpg

OEM factory installed pass side wire retainer painted with the engine

PXL_20231011_204347794.jpg

I changed out my 4 round unpainted wire insulators on the driver's side.