Plymouth Owners Club

Where can I find new front brake cylinders for a 1929 Plymouth?

I've put up the cross reference information that I know of at https://www.ply33.com/Parts/numeric

Going to the wheel cylinder portion at https://www.ply33.com/Parts/group5#5-S it seems that all four cylinders are the same and use Chrysler part number 79190.

Looking at my cross reference for that at https://www.ply33.com/Parts/group5#79190 I don't know of an exact match. But there is a similar wheel cylinder with slightly larger inside diameter. If you use those (make sure you have matching at least on the same axle) you will have a slightly longer pedal throw but otherwise no issues.

My cross reference for that similar wheel cylinder is Safe-Line W18262. Going over to Napa Online and searching for W18262 pulls up a wheel cylinder which looks correct: https://www.napaonline.com/en/p/UP_18262