that is a pretty bracket but looks like the wrong one unfortunately. I assume ( like me ) you swapped from the 350/350c trans to the 2004r. When I swapped I tried to make the 350c cable and bracket work with the 2004r trans. Then the 2004r cable with 350c bracket ( still too short ). Either the bracket is wrong, you have the incorrect shifter, or the wrong cable. Not 100% on the shifter either. Doesn't look like the one I used on my monte. I know the BOP were all specific.
In the end I had the wrong trans bracket ( probably have pics somewhere ). I then resorted to make my own. I took the 350c bracket and cut it lengthwise at the bend ( removing that whole 6" flat section where the shifter cable clips on ) and welded on a piece of flat bar in its place. Clamp the flat bar to the orig bracket to drill holes for securing the bracket later.. Then hogged out the flat bar side to make a groove. Now with 2 bolts thru the orig bracket into the grooves with nuts on the other side I have an adjustable bracket that will slide 2". Or you can find someone with the proper trans bracket.