Hi Jeff,
I saw in your Reply #3, to a guy's decal question about his '67, that those Metuchen '67's had the service decal applied vertically (sloppily) to be read with your head tilted left.
My MAR 66 car had traces that the decal was vertical also. I tried to forensically remove paint coatings to see if you had to tilt your right or left to read it. My car was 223904.
Do you have a pic around that ?