Dana 60 was an option, came with a 8 3/4 if backed by an auto. If you got the 4-speed it came stock with the Dana.
Brake booster was unique,
plenty of engine parts, valve covers, carbs are different in 70, even different between auto and stick.
The frame would have torque boxes, K-frame would have a skid plate and be a BB k-member. Hemi torsion bars are NOT welded.
Here's an original 70 Hemi Cuda valve cover... I have the rest somewhere too.
Ryan