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Old 09-07-2012, 10:35 AM
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which vacuum switch do you use for 700r4 TC lockup system?

I'm looking at 2 adjustable switches, 1-6" or 6-22" of vacuum. Which switch do you guys use? It would seem that if you're engine is a stock-mild one then you'd need 6-22" version.... correct? (mine will be on a '76 C10 with a mild 350)

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Old 09-08-2012, 04:10 AM
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Yes, for a stock to mildly cammed engine the 6-22" switch is what you'll need.
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Old 09-10-2012, 07:03 AM
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I'm using one from a Chevy truck,it switches at 7.5 ins. of vac.This seems to be just about right.
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