1995 k3500 CC RV Puller

[superchevysb]

I checked the P30 specs, it came up with a 1.312 in. bore size which is larger then the K3500's 1.25 in. bore size. Another cheap option that doesn't require a hydroboost mod is the 99-07 GMT800 1/2 ton master cylinder, it has a 1.34in bore size and will fit the existing hydroboost.

Did you measure the outside diameter of the 99-07 gmt800 1.34 bore master cylinder? I have seen it won't fit the obs hydroboost. Looked to me like the 37mm and 34mm (1.34) are cast and cut the same on the outside and just has a smaller/larger bore. I did not actually measure one yet but if it is what you say that would be perfect for me!