It is one of the Peruvian cars. It was originally an automatic, but converted to 4 speed for racing. Teodoro "El Zorro" Yangali raced it. I've got a record of roughly 10 races they participated in. The Caminos del Inca is still raced today. It's a multi-day rally from sea level up to the Andes Mountains, over 1500 miles. He won overall twice. There's an article in this year's Summer 2023 Shelby American. I was lucky enough to travel to Peru to meet the driver, navigator and mechanic last year.
Here's a video of the race:
https://www.bpvideolibrary.com/record/745Check clips at: 9:05, 11:55, 16:25, 21:25, 29:35. There are more of the car in there, but those were the easiest to find. If you've got time, the full video is pretty interesting.