After some investigation, I collected the following info about this car (although not enough for a point, I admit). But now I'm stuck.

Perhaps someone else can finish this one off with the info I provide here.
As als15 points out, it is indeed a homebuild car.
Although the car wears Abarth insignes, it is NOT an Abarth.
The car is or was located at 'Gi Kappa' near Peschiera