You can go to a smaller bore like one used for disc brake early Mustang conversions to ease the pedal pressure needed a bit. 1" was common with drums, but SUCKS with big offroad tires. Going too small makes easy pedal, but the pedal goes down a LONG ways. Doing an XJ (from '97ish) on mine, but I'd sooner do a hydroboost (like manual brakes when the motor stalls. On a dime with 38" tires on my FSJ when running)
Another thought is newer XJ or ZJ brakes with a bigger bore caliper and wheel cylinders.
I replaced my rear wheel cylinders with ones for an Eagle (already had them for an Eagle I ended up scrapping due to rust) because they were bigger bore and I took the load sensor out, but I could lock them up (33") and skid in panic stops after that.