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Old 05-17-2014, 09:07 AM   #1
airbrushguy
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Join Date: May 2010
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Identify this switch???

I have a 1971 C10 that had a 250 six cyl.
While restoring and replacing the 6with an 8 I noticed this switch which was not connected to anything on the 350 turbo automatic.
Can somebody tell me what it is and what it does?
I'm not sure the trans is original to the truck so it may not be a '71.
Thanks
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Old 05-17-2014, 09:23 AM   #2
boostedc10
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Re: Identify this switch???

It's the pressure switch. If i remember right it changes the vacuum advance of the distributor in 3rd.
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Old 05-17-2014, 09:29 AM   #3
JointTech
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Re: Identify this switch???

temp sender or spark control.
http://www.hotrodders.com/forum/th35...ch-160263.html
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Old 05-17-2014, 11:02 AM   #4
Bigdav160
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Re: Identify this switch???

Just leave it alone
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