Preheat oven to 450 degrees. In a skillet over medium heat, cook the chorizo. Meanwhile, in a small sauce pan over medium low heat combine the pinto beans, chili powder and salt. Warm through.
Lay out a single layer of tortilla chips. Top with half the crumbled chorizo, half the pinto beans and half of the cheeses. Add another layer of chips and repeat layers. Bake for 5 to 8 minutes, until cheese is bubbly and nachos are heated through. Top with sliced jalapenos and sour cream as desired.