Hey,
Not sure if anyone has posted anything like this in the past..
I wanted to tuck the bumpers on the 73 to look like the 70-71 models. My filler panel was in rough shape and I didn't care for how far the front bumper stuck out on the 73...
Here is what we did...piece of cake... you wont need any other parts...just a 5/8" drill bit..
OK, here's some instructions and pictures...
1) a picture showing the rear most hole on the brackets.. (held together with a vice grip)
Re-drill this mounting hole. you will see a square hole about an inch forward of the original hole..
drill this hole to 5/8" as shown below
This will be you new rear most mounting hole.
Now remove the vice grip and look to the inner straight bracket... you will see another square hole as shown below
drill this to 5/8" inch like shown below
You can now remove the plastic filler panel between the bumper and grill and mount the front most and rear most mounting points to the frame. Just slide the brackets back so the newly drilled holes fit the mounting points on the frame. After the front and rear bolts are in, you can drill the middle point on the frame and attach with a bolt and nut.
Here is a before and after shot of the bumper bracket location...
before
after
here is a before and after shot from above
before
after
Now remove the bumperettes and fill the bumperette mounting holes with a set of bumper bolts and you are done...
Here is a picture of a later front bumper
And here are some pictures of the finished product...
Notice, the filler panel is now removed and the bumper fits nearly flush against the grill.
There were no clearance issues with this procedure... I hope this helps anyone who was thinking of trying this!!!!
You could also slot the newly drilled holes horizontally if you want to get a little front to back adjustment on the bumper alignment. I didn't think it was nessecary though. There is about a 1/8" gap between the bumper and grill now. It looks very clean.
Just be sure now....if you are going to run in to anything head on... be sure you're going under 5 mph