My 745 had the fuel filler door hinge broken. I got a new hinge from FCP and installed it, but when I closed the door, I noticed two things. One, it closed with a loud metal clank, and two, it did not sit straight in the pocket. The side with the notch was visibly deeper than the hinge side.
I rooted around the garage and came up with a length of 7/32 vacuum hose.
Grabbing the trusty razor blade, I sliced off two pieces approximately an inch long. I then put them on the little round protrusions on the fuel door and trimmed them a bit at a time until it sat flush. The door doesn't hit the body metal any more and closes with a slight thump.
This is what it looks like:
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