Dumb question on adding tach cluster - The 1947 - Present Chevrolet & GMC Truck Message Board Network

scf100 · 10-27-2020, 04:22 PM

so on a 1971 C10 that did not come with a factory tach how hard is it to hook up the tach to one of Classic Instruments new clusters with a tach?

Thanks,

Andy4639 · 10-27-2020, 06:56 PM

The factory tach's had a 2 wire harness which you can buy on line. The one in my picture was a stock one. 1 wire goes to the distributer marked on a HEI as tach and the other goes to the fuse block under the dash on any place that gets 12 volts with the truck running.
As the picture shows it's separate from the other harness.

10-27-2020, 04:22 PM	#1
scf100 Registered User Join Date: Feb 2015 Location: Athens,Ga Posts: 217	Dumb question on adding tach cluster so on a 1971 C10 that did not come with a factory tach how hard is it to hook up the tach to one of Classic Instruments new clusters with a tach? Thanks, __________________ 1970 2WD Blazer 454 1972 C-10 Extended Cab 350 SBC

10-27-2020, 06:56 PM	#2
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Dumb question on adding tach cluster The factory tach's had a 2 wire harness which you can buy on line. The one in my picture was a stock one. 1 wire goes to the distributer marked on a HEI as tach and the other goes to the fuse block under the dash on any place that gets 12 volts with the truck running. As the picture shows it's separate from the other harness. Attached Images __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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