Firewall grommet hole for tachometer
#2391055
10/22/17 02:28 AM
10/22/17 02:28 AM
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Joined: Nov 2004
Posts: 507
340clone
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mopar
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Posts: 507
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Can anyone post a pic of the correct location for the firewall grommet hole for a tachometer on a '72-'74 B-body? (Or describe the exact location)
I know that '71 uses an existing connector on the firewall harness plug, but later years are supposed to have a dimple somewhere on the driver side firewall that marks the spot.
Thanks!
Last edited by 340clone; 10/22/17 02:29 AM.
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Re: Firewall grommet hole for tachometer
[Re: 340clone]
#2392129
10/24/17 12:37 AM
10/24/17 12:37 AM
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Joined: Aug 2007
Posts: 6,089 Valencia, España
NachoRT74
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master
Joined: Aug 2007
Posts: 6,089
Valencia, España
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Actually as far I recall, 74s also uses the only cavity left empty on NSS harness plug. 72/73 uses the grommet. There are couple of threads with this info at FBBO board, just can't post the link right now.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: Firewall grommet hole for tachometer
[Re: 340clone]
#2393332
10/26/17 01:14 PM
10/26/17 01:14 PM
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Joined: Nov 2004
Posts: 507
340clone
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Thanks for all of the photos! I was able to reference a '73 Charger with a factory tach and the hole with plug was in between the M/C backing plate and the harness block. On my '74, the harness plug that goes through there contains all of the A/C wiring that goes out to the engine bay. Must have been a change after '73. Does any one happen to have access to a '74 that may have had a factory tach? Thanks!
Last edited by 340clone; 10/26/17 01:14 PM.
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Re: Firewall grommet hole for tachometer
[Re: 71birdJ68]
#2393538
10/26/17 09:51 PM
10/26/17 09:51 PM
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Joined: Feb 2003
Posts: 16,117 Mesa, Arizona
dart4forte
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I Live Here
Joined: Feb 2003
Posts: 16,117
Mesa, Arizona
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Those aren't 71 B bodies. Yes sir, I stand corrected. Had to look again. I got the pics off a 71 B Body site.
“So if it’s on the internet it must be true”
Abe Lincoln
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Re: Firewall grommet hole for tachometer
[Re: dart4forte]
#2394188
10/28/17 12:53 PM
10/28/17 12:53 PM
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Joined: Aug 2007
Posts: 6,089 Valencia, España
NachoRT74
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master
Joined: Aug 2007
Posts: 6,089
Valencia, España
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imposible... thats A or earlier B, never 71 and later B
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: Firewall grommet hole for tachometer
[Re: 340clone]
#2394194
10/28/17 01:00 PM
10/28/17 01:00 PM
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Joined: Aug 2007
Posts: 6,089 Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,089
Valencia, España
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Thanks for all of the photos! I was able to reference a '73 Charger with a factory tach and the hole with plug was in between the M/C backing plate and the harness block. On my '74, the harness plug that goes through there contains all of the A/C wiring that goes out to the engine bay. Must have been a change after '73. Does any one happen to have access to a '74 that may have had a factory tach? Thanks! 74 bulkhead disposition, cavity 4, NSS harness BH plug As mentioned, just 72/73 are with grommet. 71s uses the engine harness plug cavity left, since AC uses the two left free on NSS harness plug ( these doesn't get the NSS ground into the cab like post 72 cars )
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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