69 Dart 340 Swinger Street/Road Race build

Kind of like what I read, the factory welds are horrible which makes it difficult to get clean enough to weld over.............. Nice build, but if you ever weld up another k frame, have it hot tanked or chemically dunk tank cleaned before welding. It is the oil and road grime that is inside the k frame that percolates out when welding that messes with the new weld. I had my k frame cleaned by a shop that has a chemical strip tank big enough to take a car body. When I got it back it was clean outside and inside, welded fine.

All the new welds went in just fine. It was just difficult to grind out all the porosity in the original welds that was the problem. Unless you get the porosity completely out, it will just come through the new weld. I think my car sitting for last 44 years helped that it wasn’t saturated with oil and grease like most are.