Help, please:

Am trying to return the '55.1 4400 Dump to usable condition, which means a complete brake system overhaul.

Of course, my front wheel cylinders are pitted, too much so for me to be comfortable in rebuilding them.

Here's my question: 1954-55 being a split year, seems to have to different size wheel cyls on the front axle: 1" on early production; 7/8" on the later production.
My truck has the 7/8 cyls, which seem to be no longer available, aftermarket; however, Raybestos still carries the 1" bore cylinders for $36.00 each.

How would the additional 1/8" in bore affect the braking of the vehicle? Enough to worry about it?

The front brakes are 14" x 2 1/2" and the rears are 15" x 4", and it has a Hydro-Vac.

Any ideas? :confused:


Frank McMullen
1941 Chevy dump truck
1949 GMC 100 pick-up
1954 Chevy 3600 pick-up
1955.1 4400 dump truck
1941 De Soto & other MoPars
1928 Model A F**D Special Coupe