I've had good results with ortho litho sheet film and a simple metol/sodium sulfite developer:

1 liter water
a pinch of sulfite
0.5 grams metol
8 grams sodium sulfite.

I expose the film at roughly EI 0.5, or 2 seconds at f16 under sunny conditions and develop 4 to 6 minutes continuous agitation in an oversize tray. Tonal range is not as good as a standard film like Tri-X, but contrast is near normal. Tonality, for lack of a better term, is not quite like standard film. Uneven development is sometimes a problem, but usually not too bad.