I have had my 70 Six Pack Roadrunner since May of 1975.
When I got the car it had the '69 Coyote Duster decal, as shown in attachment, on the air cleaner lid.
The lid is a standard Six Pack lid, not the 69 A12 lid with the extra lip, so it wasn't just taken off a 69 car.
So, either it came that way from the factory, or someone removed the original decal and put on the 69 decal.

Has anyone ever seen this decal on a 1970 Six Pack car?
If there are other instances, I will use this decal. If it seems I am the only person in the world with this decal on a 70, I'll have to assume that it was a day 2 change and use the checkered flag decal.

Robert

69 Six Pack air cleaner decal.JPG

AAR 4-speed 3.91, Tor-Red;
70 440 6 pack Roadrunner 4-speed 3.54, Plum Crazy;
68 Formula S conv 383 4-speed 3.23, Electric Blue;
69 Barracuda conv Slant 6 OD4 2.94, 71 B5 Blue;
78 Lil' Red Truck, Red;
70 Challenger S/E. 505 6 pack, Passon 5-speed, 3.55, B7 Blue