Ok so I know this may sound weird to some of you, but my truck didn't have power brakes and while converting to the 5.3 I was given the master cylinder and booster for the brakes off the 2002 silverado donna vehicle. One of my brake lines on my 81 fit the 2002 booster the the other was way to big. Does anyone know the fitting size for the brake master cylinder of a 2002 silverado so I can get a new fitting and reflare the line? Thanks for the help.
It's probaly a weird metric flare fitting or something. Give Alamo HotRod in San Antonio tx a call. They have tons of fittings.
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I just did the same thing on a 70 model truck using a 2002 hydroboost setup. I don't remember the size, but I got 2 premade lines at Oreilly's with the ends already on them and just bent them to the shape I needed.
Just go the the store and have them pull a master cylinder like you are using off the shelf and then go match it to the lines or fittings they have.
They aren't metric or anything weird, as you can see since one of your lines fits.
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