10/1965 LPB wheel cylinders

[Vernon]

Hi all,
Time to rebuild/replace all rear wheel cylinders. After I got them off and cleaned I noticed that the rubber cups are 7/8".
Can anyone help confirm the correct cylinder size for the rear? My FSM says 1.124" or 1 1/8" for the rear.
I am guessing that the wheel cylinders I currently have are not correct?

Lastly, any ideas where I can get correct size rebuild kits or new cylinders? SOR lists discontunued.

Thank you!

 

[whitey45]

I simply hone the wheels cylinders and buy new cups sold at most auto parts stores. Never had issues! I dont see your truck on the registry, can I get your vin #. Thanks