1966 valiant..

The 66 model shares the platform of the 1963-66 models. The steering gear is unique aside from the steering box itself. Shocks, and torsion bars can be used from a 67-76 model. Sway bars from other years might be made to work if you can make brackets for a custom mounting position.
Snate mentioned brakes....Yeah, you can fit newer brakes but you'll need upper control arms with larger ball joints because the popular 11 and 12" BIG bolt pattern front discs were based on B and E body spindle sizes.
The rear axle bolts in from 63-76. The pads on the axle for the leaf springs is the same for all years.