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 05-21-2015, 04:52 PM   #1
Scottcoda
Registered User
 
Scottcoda's Avatar
 
Join Date: Jun 2013
Location: Brant Lake New York
Posts: 224
Inline 250 power brake upgrade help

I have been slowly collecting the parts I need to complete my front disc conversion and I have found that performanceonline.com is having a 10% off this weekend (code 0515) so I thought it would be a good chance to pull the trigger on my master cylinder but I have been recently considering doing a power brake upgrade.
My concern is with a possible clearance issue with the 11 inch booster being brought forward due to the bracket that goes to the firewall.
I was also considering doing a dual 8' diaphragm which is not as wide but looks much longer.
To throw more into the pot I found this 8' dual set up with the proportion valve under the MC which I have never seen before and is a few hundred dollars cheaper but is on ebay. see link http://www.ebay.com/itm/331486111054...%3AMEBIDX%3AIT
Not sure which way to go or to just forget the power brake upgrade..
Anyone who has done a power brake upgrade with my kind of set up, advice would be greatly appreciated.. or any advice from anyone for that matter!!! Thanks in advance.
Attached Images
     
__________________
68 GMC 2500 stepside LWB 250CI
Scottcoda is offline   Reply With Quote
Old 05-21-2015, 07:52 PM   #2
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,496
Re: Inline 250 power brake upgrade help

I've always found that the factory set-up seems to work the best. I'd go with the one on the left..........looks more OE
kwmech is offline   Reply With Quote
Old 05-21-2015, 09:53 PM   #3
70shortstep
Registerd User
 
70shortstep's Avatar
 
Join Date: Nov 2006
Location: Little Rock,AR
Posts: 220
Re: Inline 250 power brake upgrade help



Got mine from performance online. Had a leak on prop valve. Customer service sucks. Finally got new valve and seems to work great. Still have to paint breather
__________________
John

My build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=613398
70shortstep is offline   Reply With Quote
Old 05-21-2015, 11:06 PM   #4
Custom/Ten
Registered User
 
Custom/Ten's Avatar
 
Join Date: May 2014
Location: Mobile, AL
Posts: 422
Re: Inline 250 power brake upgrade help

I went with the 11 inch. It will require a different air cleaner than the factory manual setup. Here's a pic of my setup.Name:  image.jpg
Views: 95
Size:  59.0 KB the guy above me has a factory air cleaner for the power brake setup and that is what I would recommend. They are unfortunately super rare and as far as I know you can't get an aftermarket one. I've never seen one for sale but if you were to find one it would likely be on the parts board here. That's where I got my factory ps bracket. They do make factory ps brackets but man they are ugly, and way overpriced! Back to the topic lol, yes an 11 inch booster w/bracket will fit, but not with an original air cleaner. Hard to say if it would fit with the air cleaner you have, it would be real close.

Last edited by Custom/Ten; 05-21-2015 at 11:16 PM.
Custom/Ten is offline   Reply With Quote
Old 05-21-2015, 11:20 PM   #5
Custom/Ten
Registered User
 
Custom/Ten's Avatar
 
Join Date: May 2014
Location: Mobile, AL
Posts: 422
Re: Inline 250 power brake upgrade help

Just noticed your valve cover, I think you need a pcv valve in the rear, I don't think that's right. Could be wrong but I would look into that too. It does look good though, if that does function as a pcv valve then I want one lol!
Custom/Ten is offline   Reply With Quote
Old 05-22-2015, 10:30 AM   #6
Scottcoda
Registered User
 
Scottcoda's Avatar
 
Join Date: Jun 2013
Location: Brant Lake New York
Posts: 224
Re: Inline 250 power brake upgrade help

Quote:
Originally Posted by 70shortstep View Post

Got mine from performance online. Had a leak on prop valve. Customer service sucks. Finally got new valve and seems to work great. Still have to paint breather
Hey thanks for responding!! Your input was a big help!! Other than customer service sucking did you have any issues with install??, Any major modifications you needed to do??
__________________
68 GMC 2500 stepside LWB 250CI
Scottcoda is offline   Reply With Quote
Old 05-22-2015, 08:17 PM   #7
70shortstep
Registerd User
 
70shortstep's Avatar
 
Join Date: Nov 2006
Location: Little Rock,AR
Posts: 220
Re: Inline 250 power brake upgrade help

I was very pleased with everything. Install was painless. I liked the look. If not for dealing with their customer service I would give it an A+. I called and told them the prop valve was leaking and they said they would send another. Long story short, after several calls and several weeks the part came in. Replaced it and seems to be doing great. The truck isn't on the road yet, still finishing it up.
__________________
John

My build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=613398
70shortstep is offline   Reply With Quote
Old 05-22-2015, 10:00 PM   #8
Scottcoda
Registered User
 
Scottcoda's Avatar
 
Join Date: Jun 2013
Location: Brant Lake New York
Posts: 224
Re: Inline 250 power brake upgrade help

Quote:
Originally Posted by Custom/Ten View Post
Just noticed your valve cover, I think you need a pcv valve in the rear, I don't think that's right. Could be wrong but I would look into that too. It does look good though, if that does function as a pcv valve then I want one lol!
It is a pcv valve.. Works great, I think I paid like 20 bucks on ebay or amazon.
Here is a link to one on amazon.com
http://www.amazon.com/Ball-Milled-Valve-Cover-Brea... http://www.amazon.com/Ball-Milled-Valve-Cover-Brea...
__________________
68 GMC 2500 stepside LWB 250CI
Scottcoda 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 06:14 AM.


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