I accidentally discovered that Svema FN64 (a Ukrainian film) developed in XTOL produces huge grain, uneven image tone, and occasional odd splotches. Overall, it conveys a very old look, particularly if you underdevelop a bit.
Here's an example shot. (The same film in Rodinal or PC-Glycol is much more conventional.) Ordinarily this effect is to be avoided, but it might be worth trying for your project. OTOH, I used 35mm film, I don't know if this film is made in larger formats, and even if it is I'd expect the effect I'm describing would be less pronounced in larger formats. As a practical matter, Svema film doesn't exactly have good worldwide distribution, so you'll probably have a hard time finding it outside of Eastern Europe. If you don't need to start immediately but want to experiment, try contacting the eBay seller "alex-photo." He's got some 8mm Svema movie film up for auction right now, and IIRC I bought my Svema film from him; he might be able to get some for you, but shipping is likely to take 2-4 weeks.