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 07-03-2018, 11:36 PM   #1
Kawabuggy
Registered User
 
Join Date: Jul 2018
Location: Houston, TX
Posts: 15
Help Me Choose Correct P/S Box

I'm working on a '70 C10 L/B truck. Just dropped a built 5.3LS engine with 4L60E trans into the truck the past 2 days. Truck came factory with manual steering. Since the LS motor I dropped in already has the power steering pump present, I want to upgrade the steering box to power assist.

Can anyone share with me from what year truck I can find a direct bolt in box that uses the same hose fittings as the current P/S pump has on it? Any other tips, or tricks I should be aware of regarding getting the P/S pump and new steering box to play well together?

I'm loving working on this truck already. So much room under the hood. The engine looks tiny sitting down in there! I can stand on 3 sides of the engine in the bay with my feet on the ground!

Thanks in advance for any help!
Kawabuggy is offline   Reply With Quote
Old 07-04-2018, 09:45 AM   #2
Kawabuggy
Registered User
 
Join Date: Jul 2018
Location: Houston, TX
Posts: 15
Re: Help Me Choose Correct P/S Box

Okay, I did a bunch of reading last night and have figured out that the fittings on the steering box, and/or the pump, are easily worked around.

Next, better, question.. Which power steering box has the fewest # of turns lock-to-lock, with the best "feel"?
Kawabuggy is offline   Reply With Quote
Old 07-04-2018, 10:31 AM   #3
Getter-Done
Senior Member
 
Getter-Done's Avatar
 
Join Date: Dec 2009
Location: TN.
Posts: 523
Re: Help Me Choose Correct P/S Box

The link below is the one a lot of people talk about on here.
It a little higher that your normal options.
https://www.redheadsteeringgears.com/
__________________
67 Chevy C-30 157" WB (My Crew-Cab Project)
84 Chevy K-10
63 Impala (my High-school car)
Getter-Done is offline   Reply With Quote
Old 07-04-2018, 03:27 PM   #4
Kawabuggy
Registered User
 
Join Date: Jul 2018
Location: Houston, TX
Posts: 15
Re: Help Me Choose Correct P/S Box

Looks like a very nice product but WAY over my budget. I suspect I can get the entire power steering project done for less than half the price of one of those boxes alone.

Does anyone know the specs on later steering boxes? I need something that has better "feel" and fewer turns lock-to-lock. I'm reading that the 1978+ boxes will have the metric fittings that will work with my current power steering hose connection, and will have 3.5 turns L-T-L..
Kawabuggy is offline   Reply With Quote
Old 07-04-2018, 03:41 PM   #5
AussieinNC
Registered User
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 720
Re: Help Me Choose Correct P/S Box

78 on power boxes are a better feeling box than the earlier ones...and yes...3.5 turns ltl...and metric style fittings.

Make sure the chassis has the clearance dimple where the box mounts ....being a "70" is should have it, even though it was a manual box from factory....

but I have seen 67's masquerading as later models...

What power assist are you using on the brakes?

Hydroboost is an easy conversion and will work fine with the current LS pump.
AussieinNC is offline   Reply With Quote
Old 07-04-2018, 04:38 PM   #6
Kawabuggy
Registered User
 
Join Date: Jul 2018
Location: Houston, TX
Posts: 15
Re: Help Me Choose Correct P/S Box

It has a vacuum cannister for the brakes now. I have already purchased a front disc brake conversion kit and it is coming. After the front discs, I'm leaving the brakes alone.

I'm going to go ahead and purchase a 1978+ P/S box and get it installed. Thanks for the information!
Kawabuggy is offline   Reply With Quote
Old 07-04-2018, 07:47 PM   #7
dell72
Registered User
 
Join Date: Jul 2013
Location: Southern Wisconsin
Posts: 114
Re: Help Me Choose Correct P/S Box

I installed a steering box from an 87 C-10 in my 69 C-10. The 87 box has a nice road feel and much faster ratio than the old manual box.
dell72 is offline   Reply With Quote
Old 07-05-2018, 06:53 PM   #8
Kawabuggy
Registered User
 
Join Date: Jul 2018
Location: Houston, TX
Posts: 15
Re: Help Me Choose Correct P/S Box

Dell, thanks for the information! I was wondering what the final year was that Chevy stopped putting the steering box on the OUTSIDE of the frame rail and moved it to the INSIDE. I mentioned in another post that I recently drove a 2000 Silvy 4x4 that had a P/S box and LOVED the road feel, and turning radius.. But, when I started doing research on that particular vehicle I found that the P/S box had moved to the INSIDE of the frame rail in that year. Now I know, thanks to your post, that in 87 they were still on the outside.

Now I have an idea that I'd like to throw out there.... I used to have a '69 Camaro and the hot thing to do with them was to take a 1988 Iroc Z-28 steering box and put it in that car. It gave remarkable road feel, and a very short 3 turn lock to lock... Would it be possible to remove the guts from one of those Z-28 boxes, and put the internals into a "truck" box? I guess the only thing that would worry me would be if the pittman arm is splined the same way, or not... Inquiring minds want to know if it can be done..
Kawabuggy is offline   Reply With Quote
Old 07-05-2018, 07:08 PM   #9
AussieinNC
Registered User
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 720
Re: Help Me Choose Correct P/S Box

Along with the conversion to disk fronts...make sure you get the correct master cylinder to run the disks front and drums rear...

Also make sure you use the correct brake bias valve...

And new brake pipes I assume?

On that LS engine, where are you pulling engine vacuum from for the booster?

Most folk with a built LS...aka lumpy cam, low vacuum at idle etc....swap over the hydro boost systems and run them from the power steer systems...

AussieinNC is offline   Reply With Quote
Old 07-05-2018, 09:33 PM   #10
68c10airstream
Senior Member
 
68c10airstream's Avatar
 
Join Date: Mar 2013
Location: Marquette michigan
Posts: 823
Re: Help Me Choose Correct P/S Box

Quote:
Originally Posted by Kawabuggy View Post
Dell, thanks for the information! I was wondering what the final year was that Chevy stopped putting the steering box on the OUTSIDE of the frame rail and moved it to the INSIDE. I mentioned in another post that I recently drove a 2000 Silvy 4x4 that had a P/S box and LOVED the road feel, and turning radius.. But, when I started doing research on that particular vehicle I found that the P/S box had moved to the INSIDE of the frame rail in that year. Now I know, thanks to your post, that in 87 they were still on the outside.

Now I have an idea that I'd like to throw out there.... I used to have a '69 Camaro and the hot thing to do with them was to take a 1988 Iroc Z-28 steering box and put it in that car. It gave remarkable road feel, and a very short 3 turn lock to lock... Would it be possible to remove the guts from one of those Z-28 boxes, and put the internals into a "truck" box? I guess the only thing that would worry me would be if the pittman arm is splined the same way, or not... Inquiring minds want to know if it can be done..
Stick with the 78 and newer box from a c10. You should end up with a 3 1/2 turns lock to lock and variable ratio (my favorite box). You would end up with metric o'ring style hoses needed for the box and pump. If you do a ls hydroboost change over as i did on my 68 c10, the pump reservoir tank for hydroboost has an additional return nipple on it, and the screw in fitting and valve in the back of the pump is different in a hydroboost application with a bigger hole for more volume.
68c10airstream is offline   Reply With Quote
Old 07-06-2018, 11:56 AM   #11
Willys_MB
Registered User
 
Willys_MB's Avatar
 
Join Date: Apr 2017
Location: Placerville, CA
Posts: 84
Re: Help Me Choose Correct P/S Box

Quote:
Originally Posted by dell72 View Post
I installed a steering box from an 87 C-10 in my 69 C-10. The 87 box has a nice road feel and much faster ratio than the old manual box.
Is that a direct bolt in? I'm looking at adding P/S pretty soon here and I'm trying to figure out the best route as well.
__________________
1968 GMC C2500 Long Bed Fleetside
Willys_MB is offline   Reply With Quote
Old 09-14-2018, 08:28 PM   #12
Kawabuggy
Registered User
 
Join Date: Jul 2018
Location: Houston, TX
Posts: 15
Re: Help Me Choose Correct P/S Box

Okay, just to follow up with what I ended up doing.. I bought a remanufactured P/S box for a 1985 Chevrolet Silverado. It DOES bolt right in. Then, I realized that the rag joint, or rubber isolator mount that goes between end of steering column, and P/S box-is DIFFERENT. No problem-XL parts had the correct rag joint ($69-OUCH!) and that allowed everything to bolt together correctly. Then, for the power steering line we used-wait for it...


The pressure hose for a 1985 Chevrolet Silverado! Using this pressure hose does require cutting a hole in the inner fender. The inner fender is directly on top of the threaded ports on the box. We literally used a step type bit to keep gradually opening up the hole until the line fit through the hole, and lined up with the box. The end of this line is straight so the hose sticks straight up through the hole in the inner fender. The line is the perfect length though. Everything was a direct bolt in with no fabrication (other than cutting the hole in the inner fender).

Miracle but NO LEAKS. Has to be the first time I've done anything with a P/S system and did not have leaks after the fact.
Kawabuggy is offline   Reply With Quote
Old 09-14-2018, 10:06 PM   #13
67 chevelle
Senior Member
 
67 chevelle's Avatar
 
Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,130
Re: Help Me Choose Correct P/S Box

Ill 3rd the 78 box , its whats in my 68 , it had ram assist when i got it , what a mess that was , the 78 box is great , put a sway bar up there if it does not have one
__________________
68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs
67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive
58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white
69 Long Fleet , Custom , 6.0, 4l60[hate it] , AC , Medium Olive
67 chevelle 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 07:44 AM.


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