Film developed in Rodinal generally loses speed. It's best to shoot at one stop slower than box speed if you plan on using Rodinal. That being said, the MDC shows it exposed at iso 100 diluted 1+100 for 10 minutes, you may want to add 25% to that for the push needed. This is just a starting point, your actual time for this combo can only be determined by trial and error on your part.