72 K20 bumper install help

[cmabolt]

****Bumper help please ****

Well, I didn't remove the bumpers, the original body shop did. I am having a hell of a time figuring out the brackets I have. Specifically, the outer front bumper brackets and the orientation of the rear step bumper brackets. On the rear, I only have one bolt that lines up on the frame. It should be two bolts according to the assembly manual. On the front both my outer brackets correspond to a slotted hole in the frame, but that only works on the passengers side. The steering box is in the way on the drivers side. Anybody have pics that could make this a little less of a guessing game? I would really appreciate it.

Here are pics of what I have.
rear stock option step bumper

Brackets

Hole for rear brackets

Front brackets

Hole for front brackets