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12-16-2017, 12:01 PM
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#1 |
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Registered User
Join Date: Jun 2016
Location: waterbury ct
Posts: 12
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71cheyenne factory tach
Does anyone know what hole in firewall harness goes through to install factory tach ? Thanks BOZO
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12-16-2017, 12:18 PM
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#2 |
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The Older Generation
  
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,317
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Re: 71cheyenne factory tach
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The first picture is for '72. I would presume '71 would be the same. The second is from the assembly manual.... LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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12-16-2017, 12:38 PM
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#3 |
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Cluster King
Join Date: Nov 2012
Location: Junction City, OR
Posts: 5,263
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Re: 71cheyenne factory tach
That is correct. 67 is the only year it was not routed the same.
The hole size is 3/4 inch.
__________________
Contact me on all of your gauge cluster needs. I specialize in restoration, repair and parts sales for 67-72 Chevy and GMC trucks. email me at tbonegarris@yahoo.com I am also a dealer for Counterpart for gauge cluster parts only. Also see my facebook page, CG&C |
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12-16-2017, 12:49 PM
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#4 |
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The Older Generation
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,317
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Re: 71cheyenne factory tach
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For the people reading this that have a '67, the tach wire for them exited through the same grommet as the oil pressure line, the Brown tach wire was shorter, and it did not have the built in firewall grommet on the wire. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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12-16-2017, 01:08 PM
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#5 |
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Registered User
Join Date: Jun 2016
Location: waterbury ct
Posts: 12
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Re: 71cheyenne factory tach
THANK you
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07-31-2020, 08:55 AM
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#6 |
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Senior Member
Join Date: Oct 2015
Location: Williamston, Mi
Posts: 877
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Re: 71cheyenne factory tach
I just did mine last week on my 69. I can get you a picture, but it's just like the one already posted. You just choose one of those dimples and drill a 3/4" hole, I used a hole saw and it worked great.
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