[orangek5]

I am trying to replace the rear wheel cylinders on my c-10. I purchased a pair at our local auto chain and they barely did not fit. I took them back and accroding to their computers they gave me the correct part numbers. Has anyone done this and had to modify the cylinder casting a little or did I have the wrong wheel cylinders. The numbers on the castings of the wheel cylinders that I took off are 6459 649