The range of master cylinder bore diameters for Rangers is kinda narrow...
The '86-88 Rangers ised a 15/16" bore diameter.
the '90-94 used a 1" bore
Later (I'm not exactly sure when) ford switched to a 1-1/16" bore.
the difference in pedal travel is kinda small.
a smaller bore gives more mechanical advantage over the calipers
but, as MAKG said, at the expense of more pedal travel
Though I doubt the 1/16" difference between one and the next smaller
size is enough to worry about, provided everything else is in good condition
and your self-adjusters (in the back) are working correctly.
How about being VERY SPECIFIC about the ranger you are working on
so I can make specific recommendations rather than talk general theory...
AD
