I think you guys are right. Someone told me that you could identify what car they came from by the part stamping. I found the stamping under some heavy dirt. It reads
SAE-H-70-W
This person I mentioned said that the "W" stood for the model it was off of and that corresponded with the first character of the VIN. "W" is the first character for Dodge's Coronet or Super Bee.
For comparison,I just looked at my 1971 Barracuda headlight bucket brackets. Both read SAE-H-71-B. The Barracuda's VIN begins with "B"
If this is true,it would make parts identification a lot easier.
Thanks,Dave