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77gmcjoe · 10-30-2004, 12:56 PM

SCOTI
If I was a bettin' man I'd say you could "plug and play". I was able to on my '77. The tach harness is seperate from the circuit board. You've got 3 prongs on the back of the tach, ground, 12 volt, and one goes to your coil. (They're all marked) It's nice to have a factory tach harness, but you can do it yourself pretty easy. BTW, I get more comments on the tach than anything else on the truck, so I'd bet you'd be happy with one too!

Good Luck!

Joe

10-30-2004, 12:56 PM	#7
77gmcjoe What do we get for $10? Join Date: Oct 2004 Location: Beardstown, Illinois Posts: 340	SCOTI If I was a bettin' man I'd say you could "plug and play". I was able to on my '77. The tach harness is seperate from the circuit board. You've got 3 prongs on the back of the tach, ground, 12 volt, and one goes to your coil. (They're all marked) It's nice to have a factory tach harness, but you can do it yourself pretty easy. BTW, I get more comments on the tach than anything else on the truck, so I'd bet you'd be happy with one too! Good Luck! Joe __________________ 1977 GMC K25 400/400/205 1989 Chevy Suburban R1500 350/700R4 (work beater) 1994 Chevy K3500 dually 454/4L80 1996 Corvette LT4 350/ZF 6 speed 2000 Bonneville SSEI Supercharged 3.8 Liter V6 1966 Chevelle 2 door sedan (Needs major repair ) Last edited by 77gmcjoe; 10-30-2004 at 01:02 PM.