Spiders are much easier to restore than Sprints because there is so much more available for them in terms of repro parts, plus the USA was the main market for Spiders so there are lots of them which means that bits can still be found.
Sprints much less so, the hard part with Sprints is that the bodyshell was almost constantly evolving so panel fit from one car to another is not easy when trying to find spare hoods, doors or trunk lids. Seats are not available and the aluminium trim around the doors & windows is nearly impossible to find second hand and if you are fortunate to find the alloy trim parts, shipping long bits of alloy trim becomes your next problem.
Rear screens are becoming scarce, the front ones can still be found & some companies are making repro screens. Door glass is flat, so easy to make, the internal window mechanisms are very specific to Sprints as they have framless glass so have a robust carrier & slides inside the doors.
The shell actually looks quite good from what can be seen, but yes the lower 6" is where the work usually needs to be done, that said the trunk floor looks quite good, I see doors with handles & what looks like some trim, windscreen trim, one side grille, a door sill cover, heater box etc in the rear of the car. the dashboard is unbutchered which is a big plus - all Sprints & Spiders have the same size instruments, so you can fir the early Giulietta ones or the later Giulia ones, a mix & match would see you with the 4 knobs on the dash, you don't need the fast idle screw, so you could fit a second on-off switch to operate a nice set of spotlights. The 3 beavertail switches on the left of the dash are getting hard to find, but you could fit 3 neat chrome toggles there, the steering column & shroud are there & the steering wheel looks pretty good, the indicator switch is there, e-brake & the wiring harness.....
This would be a very hard resto back to original, but a relatively straightforward Outlaw restomod - in Colorado you would want a big engine for the altitute, so 1750 or 2 liter with 5 speed - modify a 105 rear axle to take the Giulietta spring perches & reaction triangle tapered pin fitting, this gives you disc brakes, so 1600 105 discs can be made to fit the front, you can tuck a booster in there somewhere. 15" wheels with 165 tyres or if you are feeling spendy a set of the new 175/70's at Longstone in the UK
Like Gordon, I believe they all should be saved, but some are simply not economically viable to restore to original - that's when a resto-mod / Outlaw can make sense, especially if you can do a lot of the work yourself
Ciao
Greig
6 Sprints
3 Spiders
1 Ti