I couldn't remember whether that piece welded anywhere but the face of the hinge pillar. But after reviewing my photos (see attached), it's actually a 3 piece assembly. The part that goes behind the hinge just serves as a doubler for the nuts on the face of the pillar (and for the older trucks that use a bolt at the bottom of the pocket, for the 4th bolt). There are two separate pieces that appear to be heavier gauge that weld to the larger piece and the flanges of the door pillar. You made them in one piece, but I think you could just bend up two pieces to reinforce the door pillar flanges and act as doubler plates for the nuts. The bottom of the pocket serves very little purpose if there's no bolt there.
The nuts attached to the pillar are not floating cage nuts, but are welded solid to the pillar.
Attachments
IMG_3060.JPG (149.81 KB, 456 downloads)

Last edited by klhansen; 07/28/2021 12:16 AM.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.