69 DODGE DART HOW TO LEVEL THE REAR END
Welding the leaf springs may not be a good idea
This comment gets my vote for FABO Understatement Of The Day.
maybe time to look at new springs since yours are only 48 years old. I just replaced mine with Espo from Springs & Things
I did the same. The price wasn't too bad and it made the car look and drive noticeably better. As a side note, after I installed them the car was leaning to one side. It turned out the front ride height had been adjusted to compensate for the unevenly sagging leaf springs. Once I reset the front, all was good.
Two other comments:
1. Make extra sure your car is on a level surface when you make those adjustments.
2. You can't necessarily go by the wheel well height above the floor, because the body panels may not be completely straight (and the floor may not be level). For handling, the important thing is the relative positions of the wheels to the suspension, not the body. On the rear wheels you're supposed to check the distance from the axle housing to the rubber bumper above. There's no set distance, but left and right are supposed to be about the same.
Oh, and there's a SHIFT key that does the same as the CAPS LOCK but only for one letter at a time. Check it out. :-)