The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1960 - 1966 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-30-2018, 08:05 PM   #1
bsask80
Registered User
 
bsask80's Avatar
 
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 ?
bsask80 is offline   Reply With Quote
Old 03-30-2018, 10:19 PM   #2
Nanook
Registered User
 
Nanook's Avatar
 
Join Date: Feb 2016
Location: Georgetown, TX and Priddis, AB
Posts: 139
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...
Nanook is offline   Reply With Quote
Old 03-30-2018, 11:57 PM   #3
bsask80
Registered User
 
bsask80's Avatar
 
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
bsask80 is offline   Reply With Quote
Old 03-31-2018, 01:20 AM   #4
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 21,548
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
Captainfab is offline   Reply With Quote
Old 03-31-2018, 11:05 AM   #5
bsask80
Registered User
 
bsask80's Avatar
 
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
bsask80 is offline   Reply With Quote
Old 04-01-2018, 09:28 AM   #6
VictoriaHardware
Senior Member
 
VictoriaHardware's Avatar
 
Join Date: Nov 2012
Location: Southeast Michigan
Posts: 502
Re: ‘64 K20 factory tach

Quote:
Originally Posted by bsask80 View Post
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?
VictoriaHardware is offline   Reply With Quote
Old 04-02-2018, 09:32 AM   #7
Ken Cook
Active Member
 
Ken Cook's Avatar
 
Join Date: Apr 2017
Location: Ragley, La.
Posts: 119
Re: ‘64 K20 factory tach

Call RedlineG.com
He should be able to help.
Ken Cook is offline   Reply With Quote
Old 04-08-2018, 08:58 AM   #8
rideblue00
Senior Member
 
rideblue00's Avatar
 
Join Date: Feb 2010
Location: Lambertville, MI
Posts: 1,712
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
rideblue00 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:15 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com