The second picture looks like 74 brackets. They use a large metal piece behind the bumper. If you don't have that extra piece in there...the bumpers wouldn't be out as far.

Anyone else? Am I right or wrong. I thought the 70-72 brackets looked like the first pic. I know 74 brackets are different because member "Challenger1" was going to send me new bumper brackets for my 73. Luckily he sent me pics of his 74 brackets before he sent them.