General Altima’s Tires

1968 Dart GT convertible. 215/70R14. I have had the steel wheels cold pressed to factory specs, the pitman arm and the idler arm replaced with a wheel alignment, all within the last 2 years or less. I had a vibration at 50 mph that was bothersome and was told by 2 different tire stores that the tires are scalped and can’t be balanced. Now, these guys are telling me I have a bad idler arm and they couldn’t do a front end alignment. If I had to throw a stink eye at any of this , it is these young guys at Belle Tire and these tires. I have had the car for 5 years and initially, the Cobras were fine.
Along with Rusty’s question, what does it mean that you ‘had the steel wheels cold pressed to factory specs’.