So let's say I want to forego the Line Lock option, and stick with the Maximum Motorsports kit that they sell... Is this the one I need to get???

Store :: Brakes :: Master Cylinder Upgrades :: Master Cylinder adapter kit, 93 Cobra/94 GT M/C, 1987-93Master Cylinder adapter kit, 93 Cobra/94 GT M/C, 1987-93
[click for larger image]
$34.95
Part #: MMBAK-3

Product Photo Note:
Due to differences between production years and models, the actual product may differ slightly from photo. Add:

Use this adapter to install the 93 Cobra or 94 GT master cylinder on your 1987-93 Mustang. This adapts the port configuration to fit your chassis line fittings.