2. Did Cuda's with 3:55 or 4:10 Dana get rear sway bars?
No sway bars for DANA E bodies, 1970 AAR/TA E bodies 8.75 rears had bars only, IIRC the rear sway bar didn't become optional/available until 73-4 E body
My 71 Cuda 340 has a factory rear sway bar (8.75 rear)