Difference between Wilwood and Factory 1 1/8" Master Cylinders

[z71se]

Originally Posted by Pontiac1976

Question: is this for the 77. If so there no factory proportioning valve on the center frame down by the bottom of the rad by the frame steering gear.

Yes it's for the 77 C10. On my truck, there is in fact a factory proportioning valve on the frame by the bottom of the radiator. I will remove that factory valve and install a Wilwood combo valve/ adustable proportioning valve to take its place. I'm mainly curious about the actual benefits of the Wilwood master cylinder.