‘64 K20 factory tach - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bsask80 · 03-30-2018, 08:05 PM

Have a ‘64 K20 with a factory tach. Don’t know what engine was original. Has a 454 with hei ignition now. Tach needle moves but only goes from 0 to about 1500 rpm. What should I be checking ?

Nanook · 03-30-2018, 10:19 PM

You need to pull the gauge cluster and remove the tach to see if it is for a 6 cylinder or an eight. They are different tachs and cannot be interchanged.

There should be a sticker on the back that will tell you.

Pictures would help...

bsask80 · 03-30-2018, 11:57 PM

I will have to take some pics. And sounds like pull the cluster. Could maybe do some research on my vin and see what engine it came with also I guess

**Captainfab** · 03-31-2018, 01:20 AM

The VIN will not tell you what engine the truck came with from the factory. Also, most gauge clusters with factory tachs came in the medium duty trucks. So your gauge cluster may not be original to your truck. And an original tach will not work with a HEI.

bsask80 · 03-31-2018, 11:05 AM

So it really doesn’t matter what tach I have then if an original won’t work with hei

**VictoriaHardware** · 04-01-2018, 09:28 AM

Quote:

Originally Posted by bsask80

Tach needle moves but only goes from 0 to about 1500 rpm

I have a '65 V8 tach that does the same thing. It's very stable, smooth, and accurate- I checked it against a Sun tach/dwell meter. Only problem is it won't go higher than 1500 rpm. Not sure if someone repairs these or they are just not worth the cost/effort. Should I just buy a new repro?

Ken Cook · 04-02-2018, 09:32 AM

Call RedlineG.com
He should be able to help.

**rideblue00** · 04-08-2018, 08:58 AM

if you decide to change up to a new one, check out my tach install thread

http://67-72chevytrucks.com/vboard/s...d.php?t=499570

03-30-2018, 08:05 PM	#1
bsask80 Registered User Join Date: Nov 2009 Location: Coderre, SK. Canada( really close to nowhere) Posts: 86	‘64 K20 factory tach Have a ‘64 K20 with a factory tach. Don’t know what engine was original. Has a 454 with hei ignition now. Tach needle moves but only goes from 0 to about 1500 rpm. What should I be checking ?

03-30-2018, 10:19 PM	#2
Nanook Registered User Join Date: Feb 2016 Location: Georgetown, TX and Bragg Creek, AB Posts: 172	Re: ‘64 K20 factory tach You need to pull the gauge cluster and remove the tach to see if it is for a 6 cylinder or an eight. They are different tachs and cannot be interchanged. There should be a sticker on the back that will tell you. Pictures would help...

03-30-2018, 11:57 PM	#3
bsask80 Registered User Join Date: Nov 2009 Location: Coderre, SK. Canada( really close to nowhere) Posts: 86	Re: ‘64 K20 factory tach I will have to take some pics. And sounds like pull the cluster. Could maybe do some research on my vin and see what engine it came with also I guess

03-31-2018, 01:20 AM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: ‘64 K20 factory tach The VIN will not tell you what engine the truck came with from the factory. Also, most gauge clusters with factory tachs came in the medium duty trucks. So your gauge cluster may not be original to your truck. And an original tach will not work with a HEI. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

03-31-2018, 11:05 AM	#5
bsask80 Registered User Join Date: Nov 2009 Location: Coderre, SK. Canada( really close to nowhere) Posts: 86	Re: ‘64 K20 factory tach So it really doesn’t matter what tach I have then if an original won’t work with hei

04-02-2018, 09:32 AM	#7
Ken Cook Registered User Join Date: Apr 2017 Location: Ragley, La. Posts: 137	Re: ‘64 K20 factory tach Call RedlineG.com He should be able to help.

04-08-2018, 08:58 AM	#8
rideblue00 Senior Member Join Date: Feb 2010 Location: Lambertville, MI Posts: 1,854	Re: ‘64 K20 factory tach if you decide to change up to a new one, check out my tach install thread http://67-72chevytrucks.com/vboard/s...d.php?t=499570



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