Crack surrounding door striker
Beware when doing welding on the body. Way back around 76-78 when I was driving my 68 GTS, the striker cracked around the edge. My brother worked at an International dealer-and they had a stick welder, that was long before everybody had MIG welders. Anyhow he welded it with a small rod turned down. It looked pretty decent. I backed my car out of the shop and took off down the street. My 4 speed was making a hell of a noise, turned out I ruined both of the main shaft bearings in the trans. After we cleaned the old bearings up-you could see a little burn spot where every ball was sitting. Make sure you ground it good!