The column in my 69 started squeaking while turning after I put new body bushings in. Turns out I changed the angle to the steering box that the column had been in for years. I loosened the ragjoint and the collar that attaches the column to the firewall and :wiggled" things aroung to make it straight again. no more squeaking when turning.
Don't know if that helps.
69 Coupe; ZZ430; TKO600; 3.55 posi; 13" Baer 4 wheel discs; 17" Billet Specialties wheels; Hotchkis/Koni rear; Ride Tech front; Classic AutoAir AC and power windows cuz I'm old and lazy!