Front bumper location

I snugged up the rear bumper fairly tight to the body on my 73 Challenger by modifying the brackets.

I now plan to do this on the front. What reasonable options do I have? I figure I can purchase 70-71 brackets or modify the existing 73 brackets drilling new holes. Not sure if my 73 bumper bolts up to the 70-71 brackets though. Any suggestions welcome - thanks in advance. Car is ready for buffing now that the 1500 grit wet sanding is done - arms are ready to fall off.

2022-01-17_Challenger.jpg
Author: Juan Veldez