Tach question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dubie · 04-10-2002, 03:41 PM

My 72 didn't come with a tach in it, but will the wiring be there for it? I am going to replace the bezel and was just curious if the wiring was done for a tach on all the 67-72's

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72 C/10 LWB 2wd
250 inline 6, 3 speed column shift. Soon to have a total facelift.

**Desert Rat** · 04-10-2002, 03:44 PM

No its only in the tach trucks,but its a simple harness to make only a couple wires,one to fuse box other to distributor

**Desert Rat** · 04-10-2002, 03:44 PM

HEI is to dist.points to coil.

**Desert Rat** · 04-10-2002, 03:46 PM

If adding to truck in your signature and you have a 6cyl and using factory take make sure its a 6cyl one not a V8 ,most after market takes you can use either way,by the flip of a switch)

71Chev · 04-10-2002, 04:01 PM

A factory tach can be recalibrated with a small screw driver, for use on a 6 or 8 cylinder.

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71 Chevy CST Long Fleet 350/350/3.07 leaf rear.
Email: 67-72truckparts@nanosecond.com

dubie · 04-10-2002, 04:07 PM

I will be swapping the inline 6 out in a couple months for a 350. I think i just might have to check into what the wiring harness will cost. Thanks guys

------------------
72 C/10 LWB 2wd
250 inline 6, 3 speed column shift. Soon to have a total facelift.

blaznorange · 04-10-2002, 04:39 PM

Wiring harness costs 18.95 from GMCPauls. I also opted just to buy the harness rather than make one saves on asprin. blaze

**68SWB4x4** · 04-10-2002, 07:55 PM

uhhhh its one wire to fuse panel, two terminals on both ends and one to distrib.. if you need asprin for that.....

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My Truck pictures

www.xframeimpala.com

68 4x4 short fleetside 327 CH465 edelbrock intake and carb MSD distributor its the "SHAGROLET"
56 big window short stepside 235 dual 1 brls
64ImpalaSS 327
70 C10 LWB fleetside custom/10 350/TH350
IM me on aol SN= SHAGROLET

dubie · 04-11-2002, 08:26 AM

Ok, I found a pic of it at GMC Pauls website. Good price if you live in the USA, but $18.95 in Canadian, once the shipping and all is included, it's over $45!!

Man you guys in the States got it made when it comes to buying parts. I see cab corners are like $14 at GMC Pauls, we have to pay in the upwards of $40 CDN here. I think i should move to the USA just so I can finish my truck

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72 C/10 LWB 2wd
250 inline 6, 3 speed column shift. Soon to have a total facelift.

JW · 04-17-2002, 05:07 PM

Any 3 3/4" dia tach can be used. I have used 78-86 Camaro and Sun Super II tachs.
To wire a tach, (-)black to back of dash (screw)for ground, (+)red to ignition switch-on, or to fuse panel unfused (use a inline 10amp fuse), green to coil or HEI (tach).

The Camaro tach fits nicely into the dash metal case, the Sun requires alot more work.

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72 Cheyenne Super, Fleetside, Shortbed,
Original Owner

04-10-2002, 03:41 PM	#1
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,853	Tach question My 72 didn't come with a tach in it, but will the wiring be there for it? I am going to replace the bezel and was just curious if the wiring was done for a tach on all the 67-72's ------------------ 72 C/10 LWB 2wd 250 inline 6, 3 speed column shift. Soon to have a total facelift. __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

04-10-2002, 04:01 PM	#5
71Chev Senior Member Join Date: Dec 2000 Location: Indiana Posts: 3,074	A factory tach can be recalibrated with a small screw driver, for use on a 6 or 8 cylinder. ------------------ 71 Chevy CST Long Fleet 350/350/3.07 leaf rear. Email: 67-72truckparts@nanosecond.com __________________ 71 Chevy CST Long Fleet 350/350/3.07 leaf rear.

04-10-2002, 04:07 PM	#6
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,853	I will be swapping the inline 6 out in a couple months for a 350. I think i just might have to check into what the wiring harness will cost. Thanks guys ------------------ 72 C/10 LWB 2wd 250 inline 6, 3 speed column shift. Soon to have a total facelift. __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

04-10-2002, 07:55 PM	#8
68SWB4x4 Strongman Garage Join Date: Apr 2000 Location: Salinas, CA Posts: 10,241	uhhhh its one wire to fuse panel, two terminals on both ends and one to distrib.. if you need asprin for that..... ------------------ My Truck pictures www.xframeimpala.com 68 4x4 short fleetside 327 CH465 edelbrock intake and carb MSD distributor its the "SHAGROLET" 56 big window short stepside 235 dual 1 brls 64ImpalaSS 327 70 C10 LWB fleetside custom/10 350/TH350 IM me on aol SN= SHAGROLET __________________ Kalle 68 GMC Suburban 1500 4x4 SOLD 69 Pontiac Lemans 99 Silverado 4.8 5 speed ECSB [ Facebook Instagram Subscribe on YOUTUBE

04-11-2002, 08:26 AM	#9
dubie Registered User Join Date: May 2000 Location: Flin Flon, Manitoba, Canada Posts: 8,853	Ok, I found a pic of it at GMC Pauls website. Good price if you live in the USA, but $18.95 in Canadian, once the shipping and all is included, it's over $45!! Man you guys in the States got it made when it comes to buying parts. I see cab corners are like $14 at GMC Pauls, we have to pay in the upwards of $40 CDN here. I think i should move to the USA just so I can finish my truck ------------------ 72 C/10 LWB 2wd 250 inline 6, 3 speed column shift. Soon to have a total facelift. __________________ My name's Tim and I'm a truckaholic My 56 Chevy shop truck build http://67-72chevytrucks.com/vboard/s...d.php?t=562795

04-10-2002, 03:44 PM	#2
Desert Rat Senior Member Join Date: Dec 1999 Location: Darrington, Washington Posts: 3,963	No its only in the tach trucks,but its a simple harness to make only a couple wires,one to fuse box other to distributor

04-10-2002, 03:46 PM	#4
Desert Rat Senior Member Join Date: Dec 1999 Location: Darrington, Washington Posts: 3,963	If adding to truck in your signature and you have a 6cyl and using factory take make sure its a 6cyl one not a V8 ,most after market takes you can use either way,by the flip of a switch)

04-10-2002, 04:39 PM	#7
blaznorange Registered User Join Date: Jan 2002 Location: Mahnomen, MN Posts: 29	Wiring harness costs 18.95 from GMCPauls. I also opted just to buy the harness rather than make one saves on asprin. blaze

04-17-2002, 05:07 PM	#10
JW Registered User Join Date: Apr 2000 Location: Carmichael, Ca Posts: 67	Any 3 3/4" dia tach can be used. I have used 78-86 Camaro and Sun Super II tachs. To wire a tach, (-)black to back of dash (screw)for ground, (+)red to ignition switch-on, or to fuse panel unfused (use a inline 10amp fuse), green to coil or HEI (tach). The Camaro tach fits nicely into the dash metal case, the Sun requires alot more work. ------------------ 72 Cheyenne Super, Fleetside, Shortbed, Original Owner __________________ 72 Cheyenne Super, Fleetside, Shortbed, Original Owner, Special Ordered 350ci/340hp, Auto Trans, 3:70 Posi, Tow Package Northern Calif

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