In order to install the Baer Brake system onto the OE 79-93 V8 Mustang spindle you are required to modify your stock spindles. To do this we have assembled a kit that includes (1) 27/64" Drill bit, (1) 1/2-13 UNC Tap, (2) Alignment Bushings & (2) 5/16-18x.750" bolts. In addition to these items, you will need a tap wrench, hand drill, reciprocating saw w/metal blade and cutting fluid. You can refer to insteuctions below for more details.