Like Leon, I would try and accentuate the misty look of the image.
There are many types of intensifiers. Some are proportional while others are not. There are also silver based intensifiers which react differently than chromium ones. Check out the Photographer's Formulary website, they probably have one of the finest selections out there.
Enlarger light will also accentuate contrast. The most contrast can be had with a point light source. These have fallen out of favor many years ago but can still be found. If not, I think using a condenser light with a clear bulb (with a vertical filament) probably would give similar results. On the downside, every speck of dust shows like big black spots and require extensive spotting.
If all fails, you can always try to copy the negative on copy film. Every time you duplicate a negative, contrast increases quite a bit.
You can also do a paper negative and play with the densities using artist's charcoal on the back side. On the first positive print, you accentuate the shadows. On the second negative print, you accentuate the highlights. Then, you have your final print from the second paper negative.
I've never done it, but it might be a candidate for
lithprint. The process can give surprising results (like good prints from low contrast color negative) so it might be worth a try.
You could also do a digital negative...
Are we forgetting something...
