1/32"
studs won't line up quite right either you will have to make the wholes a little bigger as well but not much
from what good write ups say using kj (liberty) brake lines part number 52128510-AG work well
Try it, you'll be surprised what your missing.
I just swapped the guts of a ZJ's prop valve into my XJ prop valve. Easy.
I suppose you still have to pull the valve to do so and then bleed the brakes, right?