On early cars such as mine (11-69) the rear bar wasn't an option until later in the year. I didn't have holes or locating dimples of any kind. BTW a thumbs up for the guys at Firm Feel. When I got to installing the right bracket to my frame rail I discovered a repair cap had been installed. It was a decent job but what this did was make the frame rail too wide to put the bracket over. I called Firm Feel and what they did was exchange one of my e body brackets for a b body unit which is about 1/4 " wider. They didn't even charge me for return shipping!