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 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-20-2007, 11:49 PM   #1
skokie
Registered User
 
skokie's Avatar
 
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,342
3 prong intake fitting

Can someone tell me what the 3rd prong is for on this fitting?
I know the bigger threaded one is for power brakes and I have the threaded steel line piece to go with it. One of the 2 smaller are for the turbo 400 but what is the third for?
Could I run my vacuum guage off of it?


__________________
RIP to my son Dylan. 5/17/2002 - 8/18/2018
If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started.
https://slothforpedcancer.org



68 build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=223234

Last edited by skokie; 02-20-2007 at 11:49 PM.
skokie is offline   Reply With Quote
Old 02-21-2007, 12:16 AM   #2
sdkid
Registered User
 
Join Date: Sep 2004
Location: Pierre SD
Posts: 1,533
Re: 3 prong intake fitting

Could be for anything really. Some had a cap on the extra. It may not have even been used on your truck. I think you could hook your vac gauge to it.
__________________
I think the world needs a drink...

Help somebody...If you can....VanZant

We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men.
Tracy Byrd

Member# 13924
'70 c10, 350/350
'68 c10 250/4spd
'68 c10 no eng/trans fac ps/pb/ac/at
(future father/sons project)
'48 Chevy Loadmaster
sdkid is offline   Reply With Quote
Old 02-21-2007, 12:35 AM   #3
Bob Moore
Registered User
 
Join Date: Feb 2004
Location: Tacoma WA
Posts: 1,365
Re: 3 prong intake fitting

sdkid is correct. Hook up your vac guage there. I have even seen 4 prong fittings.
__________________
67 C-20 LWB, tilt, speed alert,
vac, 454, T400
67 C-10 SWB, factory air with
more to follow
Bob Moore is offline   Reply With Quote
Old 02-21-2007, 12:54 AM   #4
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,599
Re: 3 prong intake fitting

Threaded one for the brake booster, the one with the ridge for the trans and the other for the AC vac cannister
kwmech is offline   Reply With Quote
Old 02-21-2007, 01:04 AM   #5
skokie
Registered User
 
skokie's Avatar
 
Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,342
Re: 3 prong intake fitting

Thanks kwmech. Since I dont have a ac vac cannister then its heading for the vacuum guage
__________________
RIP to my son Dylan. 5/17/2002 - 8/18/2018
If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started.
https://slothforpedcancer.org



68 build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=223234
skokie is offline   Reply With Quote
Old 02-21-2007, 01:07 AM   #6
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,599
Re: 3 prong intake fitting

There ya go
kwmech is offline   Reply With Quote
Reply

Bookmarks


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 03:52 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com