Hello forum members, I need some help. I am working on a 1950 Chevy 3100 and the passenger door lock was missing. I got one from Chevy"s of the 40's. I installed it and it didn't work. I removed it checked everything and tried it again. I found the shaft was to short and did not go into the lock mechanism, it was about 1/4 inch short. I had a welder friend extend it. Now the problem is if the door is locked, I can unlock it but I can not lock it again with the key. The key and shaft move but it will not move the lock mechanism. If the door is unlocked, I can lock it but can't unlock it. It seems like the door lock shaft fits to loose inside the mechanism. If I use a flat blade screw driver, it works perfectly! I need help to make this lock work! Does anyone have any ideas? Thank you all in advance!