Brake conversion 73 duster
The kit I designed used an 11.75 cop car rotor, Doctor Diff uses a 1/2 ton rotor with a bearing spacer to make up the difference. His design is a little better since the pickup rotor is 1.25 wide. The Viper caliper needs a 1.250 thick rotor and it is nice to have the extra beef in the rotor. My kit used pad spacers to take up the extra distance but I think running a 1.250 rotor is the better way to go. Good luck and have fun. Either build your own kit or buy the one from Doctor Diff. I've been building my own brake kits for more than 20 years. When I first started building brake kits nobody had big brakes on a Mopar.
The kit I designed used an 11.75 cop car rotor, Doctor Diff uses a 1/2 ton rotor with a bearing spacer to make up the difference. His design is a little better since the pickup rotor is 1.25 wide. The Viper caliper needs a 1.250 thick rotor and it is nice to have the extra beef in the rotor. My kit used pad spacers to take up the extra distance but I think running a 1.250 rotor is the better way to go. Good luck and have fun. Either build your own kit or buy the one from Doctor Diff. I've been building my own brake kits for more than 20 years. When I first started building brake kits nobody had big brakes on a Mopar.
