We have a used Wilwood Aluminum Dynalite 4 Piston Brake Caliper 120-1051 with Pads.The piston size is 1.750". It is for use with a 3/8" thick brake rotor.The bolt mounting pattern is 5.250" center to center.It has been setting and might need o-rings and will need bleeders.You might be able to use this.
