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Old 06-13-2006, 10:18 AM
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vacuum line, what size ?

I have a 350 / 350 setup in my 50 chevy pick-up and it currently has a long hose being used for the vacuum line on the tranny. I know this line should be steel. I have looked for a stock line, but having a hard time finding one. My question is, what size brake line 3/16 or 1/4 has others used, or does it matter? 3/16 is easier to bind and cleaner looking but is vacuum volume an issue. Thanks

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Old 06-13-2006, 11:20 AM
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No volume issues. 3/16" is plenty. It never really "flows" much, just enough to yank on the vacuum modulator so small is fine.
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Old 06-13-2006, 12:26 PM
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The smaller the better actually so there is less air to move... 1/8th inch would work great...
Mark
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Old 06-13-2006, 12:57 PM
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1/8" is fine.
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Old 06-14-2006, 09:43 PM
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Thanks for your help, I'll get busy.
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