Master Cylinder - 67 Barracuda converted to front disc brakes

That looks like a drum drum master.

Masters come in 3 sizes (basically) for our cars

1 inch is the typical standard size for our cars. (power or manual, disk or drum)

15/16 will decrease the amount of leg force but increase the travel


1-1/32 will increase the leg force but decrease the travel


Disk drum
Screenshot_20240817-105740.png

Drum drumScreenshot_20240817-110028.png