Two owner car. Makes no sense why someone would just bolt on one of many AC brackets with no intent of installing AC.
Is it numbers matching?
Then it most likely was a production item. I remember seeing many 400 and 440 non a/c cars with them. I just don't remember what year it started. It could of been a plant or just easier to have the bracket in place weather it was a/c or not. If I remember correctly earlier big blocks did not have them. Same rv2 compressor but maybe different mounting brackets.
