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#1 |
Registered User
Join Date: Nov 2014
Location: The Old Dominion
Posts: 62
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'60 Apache Front Disc Brake Conversion MC to Prop Valve Lines
I installed a 1990 1500 booster for the conversion and purchased the matching master cylinder. I couldn't find a proportioning valve local so I ordered one supposedly specific to the master. The front line out of the master is 1/4" with a 9/16-18 thread. The front line in the proportioning valve is 3/16" with a smaller thread.
I was considering returning everything and ordering a combo kit from Summit etc... but the tech rep said he couldn't guarantee that their combo would work with the booster. He suggested I install an adapter in the larger port to fit a 3/16" line. Has anyone run into this issue? Has anyone installed a specific master, prop valve and line kit on this booster? Is installing the suggested adapter a viable solution? I thought I would finish this today but it never works out that way. I appreciate whatever help you guys can lend. |
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#2 |
Senior Member
![]() Join Date: Nov 2013
Location: Portland, OR
Posts: 527
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Re: '60 Apache Front Disc Brake Conversion MC to Prop Valve Lines
I can't seem to find an OEM version of the proportioning valve anywhere, so you might be stuck with using the adapter if you want to keep the 1990 booster/master cylinder setup. I doubt the adapter would cause any problems.
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#3 |
Registered User
Join Date: Nov 2014
Location: The Old Dominion
Posts: 62
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Re: '60 Apache Front Disc Brake Conversion MC to Prop Valve Lines
Thanks for responding. I'm stuck with the booster. I already cut and threaded the shaft. I have not been able to find the adapter locally. I also wondered if there was a master and proportioning valve from another GM vehicle that will fit the booster I have. So far I haven't had much luck.
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