This is a carry over post from the discussion on '68 Z/28 Battery Ground Strap Location...
I guess you are right, I don't know for sure. The car had one owner for a year and 3 or 4 months. He purchased the car off the dealership lot where he was a mechanic. His wife got pregnant and they already had 2 children and couldn't fit another in the back seat. So they sold the car. He died a few years ago. Why would HE pull the battery and randomly chalk an arrow? Probably still had the original battery.
Second owner had the car for 48 YEARS! Only drove the car 1,683 miles in 43 years 3 months and 10 days of those 48 years. Other years the car was driven quit extensively racking up thousands and thousands of miles before being parked. Car sat for 17 years then was driven for a day or two, then sat another 17 years. He is alive and well in his mid 70's, and I have talked to him several times. He said he put less than 100 miles on the car in 34 years. And HE didn't randomly paint an arrow.
Third owner drove the car a few 100 feet in a couple years. On and off trailer. Car barely ran, many leaks brakes all needing repairs etc. Was a flip purchase. He didn't randomly paint an arrow.
I am the 4th owner and noticed it during one of my cleaning and detail jobs.
SOOOO ... I am going to call it factory for now. ... Danny