Door lock problem - is it the cylinder?

[Stanley]

Since getting the '73 back from the body shop where they installed a new driver side door, it won't unlock with the key. It locks with the key from outside just fine. When you try to unlock it you can see the lock button going up about 3/4 of the way but it won't quite unlock. It locks OK from inside with the button.

Went back to the body shop, they said it was the cylinder so they couldn't fix it but maybe they just didn't want to do free labor. The lock worked fine before the accident and door swap so I doubt if it's the cylinder. The door handle area wasn't hit.

[zKars]

The three flat head phillips bolts that hold the latch assembly in the door, use different length bolts in the three positions. I think if you put one of the long ones in the bottom holes, it gets in the way of the mechanism. Seen this before. 

Anyway, try that first.

[Stanley]

I'll try that. Other problems now, computer related.