Great found. Congratulation
Meanwhile I've found a lot of informations about the car:
Designation: "Ferrari Guerra Sport"
Builder: Carlos Alberto Guerra (Argentina)
Engine: Fiat 125B, 1608ccm, DOHC, 100 HP
Suspension: like Fiat 125, rear live axle
Front disc brakes, drums at the rear
Steering: Fiat 128
Fiberglass bodywork
It took him 26 years to complete this project since its beginnings