The best source for this information is one of the auto parts store websites. Select the 94 Mustang as the car and see when you get for a part number. Then do a lookup and see what other cars use the same part number.
Google search turned this up:
These cars have 3G 130A clocked at 12:00 and will require fox bracket notched:
94-95 GT Mustang
94-06 V6 Mustang
94-97 3.8L Thunderbird **NON-S/C**
94-97 V6 t-bird