They can process 828.
Here are the steps to process Kodachrome: 1. Acquire several 50 gallon drums of chemistry for large sum of money. 2 Acquire proper filters for another large sum of money. 3 Find specifications for re-exposure steps in foot candle seconds. 4 set aside several days in which to process a few rolls of film.
I tried to process 120 Kodachrome and it failed. I will likely try again when I have time to waste. I'm positive given chemistry, filters, and specs I could run the process. It's been done before. Unfortunately I have neither of the three and poking in the dark results in strange colored film.