That's what I did when I first changed clutch type and had to deal with a longer throw. I put a washer under the bottom MC bolt flange to tip it down. That was fine with my old cast iron MC. With my new aluminum one, it's probably not a good idea as the housing flanges might crack.
Apparently the new versions of my car have the MC bracket tipped down a bit. I really don't want to cut my bracket off and re-weld it back on at an angle as not only is access for the work difficult, it would mess up the nice powder coat.
I intend to enlarge the hole slightly where it touches (see below):
