Suspension upgrade?

Is this the 71 Demon in your avatar?

is it mostly a stock appearing car?

For stock appearing, I’d go with:

1. firm feel steering gear. To reduce the over assisted/boosted steering feel
2. Moog 7103 upper bushings for increased caster alignment numbers. To help center the car at higher speeds and reduce wondering effect and feel
   
3. Poly sway bar end links on your factory front sway bar for quicker more immediate sway control when changing lanes on freeway.