‘70 Dart rear bumper brackets

Hi. I’m restoring my ‘70 Dart Swinger. The car came with a ‘72 rear bumper. I got a new ‘70 bumper from AMD. Does anyone know if the bumper mounting brackets for ‘70 bumper are the same as or different from a ‘72? The one I removed has a long support across the length of the bumper plus the two brackets that mount to the body. I don’t think I need the long bracket as it looks like it provides extra support for the slotted jack. When I used just the body brackets alone, the bumper looks like it sticks out further than normal. Thanks.