Early and mid year Firewall harness clip

Can anyone confirm the clip used on '67 and '68 A-bodies was the same as used on the earlier years?
Earlier years used four.
Only one is used on '67-8. Not 100% sure all cars got them, but some did.
002-wind-1967-plymouth-barracuda-closeup-firewall-clip.jpg

1969 up used a different version that attached with a sheet metal screw.