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Old 03-13-2018, 10:59 PM   #1
69BUCKET
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69 c10 ls/th350

What are guys using to "T" off at LS truck intake to use for brake booster and th350 modulator vacuum?
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Old 03-13-2018, 11:10 PM   #2
67 chevelle
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Re: 69 c10 ls/th350

There is a nipple on the back of the manifold , or 2 , I think you have to pop off the end of it if the donor truck had hydraboost
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Old 03-14-2018, 12:15 AM   #3
69BUCKET
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Re: 69 c10 ls/th350

Not sure if donor had hydro or not. It does have an opening for booster I think...measures 7/8". Been trying to find a T fitting ...no luck yet.
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Old 03-14-2018, 12:26 AM   #4
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Re: 69 c10 ls/th350

My 6.0 LQ4 donor did not have a booster as it had hydro boost. However the vacuum was on the back of the manifold but it had a plug in it. Pulled out the plug and used a vacuum hose off a 1500 truck that had a vacuum booster.

As far as the TH350 modulator, I connected to a nipple on the manifold on the passenger side. It was capped as well but I just cut off the cap. transmission shifts as it should.
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