The popping in the rear sounds like sway bar end links. ive replaced mine twice already. Also sounds like youve got some shot bushings back there too. Check that stuff out and see what you find.
1995 Thunderbird LX: Vortech S-Trim(12psi), Forged PI 4.6, T-45, SCT Tune, Eibach Pro-kit, Magnaflow DI/DO Exhaust, 3.73 TL, and 17" Cobras
1995 Thunderbird SC: Bone Stock