|Paul: here's the "fix" for the trunk lockI posted in March, 2018. Every car that I have worked on I have done this since the nylon piece to allow the spring to open the lock is frankly a little too short. Cut a piece off the metal part that is held up by spring pressure(i.e. shorten it a bit); this allows the nylon to "hit" the part that allows the latch to open.
Frank; just read this; have quite a few; I grind the sharp tips down a bit so it "slides" in easier but still holds the lock down nicely, using vaseline or grease to make assembly easier. The tough part with installing the lock is the "return" spring. I use a wooden clamp and some wood to hold down the lock while I attempt(very "testy") to get that return spring in the proper holes while having the bolt handy for tightening down. Smaller fingers and better eyes might be useful here. You may want to put a removable rag into the space first as losing that return spring down one of the trunk channels is likely.
take care, bruce
I have plenty of used locks, etc. if yours can't be worked out.