Cajun Tach Shop Upgrade - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Already Gone** · 08-22-2024, 11:29 AM

I bought the pictured Tach Board off EBay from the Cajun Tach Shop Store and a friend installed in my factory original tach. My tach was always reading 7-800 RPM high at highway speeds. With this new board its very accurate now. Just passing along in case someone having the same issues. I have the Petronix Stock look Distributor and components on the truck.

**samkost** · 08-23-2024, 01:04 PM

I can also recommend Greg @ https://www.cajuntachshop.com/

My OE tach finally gave up so I replaced it with an after market tach.
The replacement tachometer only lasted a couple of years.
I sent both to Greg for the upgrades he had been working on and he successfully repaired both.

**'68OrangeSunshine** · 08-23-2024, 03:30 PM

Pertronix Ignitor I and II are OK with any Tach. Ignitor III is an electronic multi spark unit like MSD. A friend with a '72 F-250 and 429 BBF had the mark III, and his tach went crazy. He called Pertronix, and they told him to retrofit to a mark II if he wanted to run a Tach.

08-22-2024, 11:29 AM	#1
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,139	Cajun Tach Shop Upgrade I bought the pictured Tach Board off EBay from the Cajun Tach Shop Store and a friend installed in my factory original tach. My tach was always reading 7-800 RPM high at highway speeds. With this new board its very accurate now. Just passing along in case someone having the same issues. I have the Petronix Stock look Distributor and components on the truck. Attached Images __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

08-23-2024, 01:04 PM	#2
samkost Senior Member Join Date: Sep 2014 Location: Lake Tapps, Wa. Posts: 673	Re: Cajun Tach Shop Upgrade I can also recommend Greg @ https://www.cajuntachshop.com/ My OE tach finally gave up so I replaced it with an after market tach. The replacement tachometer only lasted a couple of years. I sent both to Greg for the upgrades he had been working on and he successfully repaired both. __________________ Sam 1972 C10 LWB 2020 Z71 Tahoe

08-23-2024, 03:30 PM	#3
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,423	Re: Cajun Tach Shop Upgrade Pertronix Ignitor I and II are OK with any Tach. Ignitor III is an electronic multi spark unit like MSD. A friend with a '72 F-250 and 429 BBF had the mark III, and his tach went crazy. He called Pertronix, and they told him to retrofit to a mark II if he wanted to run a Tach. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.



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