My bothersome shimmy went away. Yay!

MOPAR brethren (and sisterhood): I'm posting the following for what it's worth, in the hopes that it may help someone else. My 1974 Duster that I bought in 2019 with 238K miles had a noticeable shimmy (wobble) in the steering wheel above 55 mph. You could also feel the wobble in the car the faster you drove. I had all four wheels rebalanced, but that didn't help. The only front end components that weren't factory original were the lower ball joints. What did help was rebuilding the front end. By replacing the upper and lower ball joints, control arm bushings, tie rods and their ends, the stabilizer link bushings, the steering arm and the idler arm, the wobble and shimmy have completely disappeared. So if you have a persistent shaking problem in your front end that won't go away by balancing the tires, a front end rebuild is probably necessary. I'm extremely happy with my car, which now drives smoothly and shimmy free. Just like a brand new Duster. Something to consider if your car has the same problem that mine did. Good luck!