Is the smaller Fox Mustang brake booster a direct swap for the larger one on my '88 Thunderbird?
I know it was on my 84 if that helps.
I figured it was a bolt on, but wanting to be sure it will function just fine.
Any non sn95 booster should drop in. Sn95 booster will fit but you must elongate one hole or use a 93 cobra booster which is basically a Sn95 booster with fox stud pattern.