Tires wearing on the inside is likely alignment, too much positive camber. And yes, the LCA will need disconnected to remove the spring/shock assembly.
I have 220k on my 95 T-Bird's springs, they don't sag. Are you using smaller tires in the front only?
97 T-Bird LX 4.6 - 80k miles
94 Supra TT Auto - street/strip car
04 CVPI- Brenda's car - 76k miles
95 T-Bird LX 4.6 - fully optioned, owned 15 years, 220k miles
96 Cougar XR-7 4.6- Brenda's car, owned 11 years, 187k miles
88 T-Bird 3.8 - first T-Bird, owned 5 years, 206k miles