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Old 03-26-2023, 11:25 AM   #1
Yamariv
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Adding Power Steering Box - Bolt right up to frame??

Hey guys, I'm slowly collecting all the stock parts to add power steering to my L6 250 truck. I've seen a couple Youtube videos with guys installing conversion kits (I'm using all stock components) where the kits come with mounting brackets to attach the steering box to the frame. Mind you both videos were for other generation trucks..(60's Chev and Square body)

Will my stock power steering box bolt right up to my 71 frame or do I need to source or add these frame mount brackets I've been seeing?

Thx!
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1971 Chev C10 - 250ci L6 w/3 speed on the floor

Upgrades: Power Steering
3 Core Radiator
7 Hole Gauge Cluster
Power Brakes (Incoming!!..)
1971 350 (Incoming!!..)
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Old 03-26-2023, 11:42 AM   #2
Grumpy old man
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Re: Adding Power Steering Box - Bolt right up to frame??

Post a picture of what you have ?

when I converted my 67 from manual to power steering I used a 76 c10 box to get the quicker steering ratio I think it's 3.5 lock to lock . It's a cardone 27-7501 it bolted right in place of the manual box .
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1967 Factory short bed - Old school
'71 - 350 / 4bolt / 487 heads / Edelbrock C3BX
Muncie M-22 4 speed / Hurst Comp plus
Factory 12 bolt posi 3.73 / 255-70-15
Smoothed firewall / Factory cowl induction
Power disc brakes / power steering / 3.5-5" drop
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Old 03-26-2023, 11:58 AM   #3
LockDoc
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Re: Adding Power Steering Box - Bolt right up to frame??

Quote:
Originally Posted by Yamariv View Post
Hey guys, I'm slowly collecting all the stock parts to add power steering to my L6 250 truck. I've seen a couple Youtube videos with guys installing conversion kits (I'm using all stock components) where the kits come with mounting brackets to attach the steering box to the frame. Mind you both videos were for other generation trucks..(60's Chev and Square body)

Will my stock power steering box bolt right up to my 71 frame or do I need to source or add these frame mount brackets I've been seeing?

Thx!

All of the truck boxes up to '87 are a direct bolt on as far as fitting the '71 frame.

LockDoc
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http://67-72chevytrucks.com/vboard/s...d.php?t=829820

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Old 03-26-2023, 12:22 PM   #4
Yamariv
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Re: Adding Power Steering Box - Bolt right up to frame??

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Originally Posted by LockDoc View Post
All of the truck boxes up to '87 are a direct bolt on as far as fitting the '71 frame.

LockDoc
That's what all my research showed as well. Do you know why these aftermarket kits always include extra mounting brackets? Seems odd they would if we don't need it
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1971 Chev C10 - 250ci L6 w/3 speed on the floor

Upgrades: Power Steering
3 Core Radiator
7 Hole Gauge Cluster
Power Brakes (Incoming!!..)
1971 350 (Incoming!!..)
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Old 03-26-2023, 12:24 PM   #5
Yamariv
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Re: Adding Power Steering Box - Bolt right up to frame??

Quote:
Originally Posted by Grumpy old man View Post
Post a picture of what you have ?

when I converted my 67 from manual to power steering I used a 76 c10 box to get the quicker steering ratio I think it's 3.5 lock to lock . It's a cardone 27-7501 it bolted right in place of the manual box .
Nice setup, that's one clean engine bay, wow!

The power steering box is still in transit with my dad. It's out of a 72 C10. You want pics of the box or my current stock manual steering box on my 71 truck?
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1971 Chev C10 - 250ci L6 w/3 speed on the floor

Upgrades: Power Steering
3 Core Radiator
7 Hole Gauge Cluster
Power Brakes (Incoming!!..)
1971 350 (Incoming!!..)
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Old 03-26-2023, 02:15 PM   #6
bigmoe
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Re: Adding Power Steering Box - Bolt right up to frame??

Quote:
Originally Posted by Yamariv View Post
That's what all my research showed as well. Do you know why these aftermarket kits always include extra mounting brackets? Seems odd they would if we don't need it
The adapter brackets are needed for the earlier trucks. I needed one for my 65 when I put the square body box on.
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Old 03-26-2023, 02:50 PM   #7
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Re: Adding Power Steering Box - Bolt right up to frame??

FWIW my 72 PS box bolts direct to frame. maybe some of the brackets in "the kit" are to mount a PS pump...

I just bought a new box, rag joint and lines to replace the originals.
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Old 03-26-2023, 05:11 PM   #8
LockDoc
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Re: Adding Power Steering Box - Bolt right up to frame??

Quote:
Originally Posted by Yamariv View Post
That's what all my research showed as well. Do you know why these aftermarket kits always include extra mounting brackets? Seems odd they would if we don't need it

I have never looked at or conducted any research on those kits so I can't answer that one. Mounting a frame mounted power steering box into a '67 frame would require an adapter or frame modification so maybe that is what the kit covers.

LockDoc
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http://67-72chevytrucks.com/vboard/s...d.php?t=829820

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Old 03-26-2023, 10:15 PM   #9
Yamariv
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Re: Adding Power Steering Box - Bolt right up to frame??

Quote:
Originally Posted by LockDoc View Post
I have never looked at or conducted any research on those kits so I can't answer that one. Mounting a frame mounted power steering box into a '67 frame would require an adapter or frame modification so maybe that is what the kit covers.

LockDoc
Sorry about the poor picture off of my computer screen but that's from a video of a guy installing a steering box on an 60's C10. The thing that got me worried was I saw another install video for a kit on a square body and that guy was also using that same bracket for the box

Sounds like the verdict is she's a direct bolt on to my truck which is great! Just odd about the kits with the brackets lol
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1971 Chev C10 - 250ci L6 w/3 speed on the floor

Upgrades: Power Steering
3 Core Radiator
7 Hole Gauge Cluster
Power Brakes (Incoming!!..)
1971 350 (Incoming!!..)
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Old 03-26-2023, 11:04 PM   #10
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Re: Adding Power Steering Box - Bolt right up to frame??

I think I remember Stacey David going on about some square body frames tending to crack at the power steering box mount. Think it might have been the stunt man truck build on gearz.

Those kits might be to reinforce that frame rail there.

you can find some links (the one I tried to post didn't work here) on google for squarebody frame crack power steering
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Old 03-26-2023, 11:18 PM   #11
Yamariv
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Re: Adding Power Steering Box - Bolt right up to frame??

Quote:
Originally Posted by zosoppp View Post
I think I remember Stacey David going on about some square body frames tending to crack at the power steering box mount. Think it might have been the stunt man truck build on gearz.

Those kits might be to reinforce that frame rail there.

you can find some links (the one I tried to post didn't work here) on google for squarebody frame crack power steering
Interesting, no issues with the 67-72's?
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1971 Chev C10 - 250ci L6 w/3 speed on the floor

Upgrades: Power Steering
3 Core Radiator
7 Hole Gauge Cluster
Power Brakes (Incoming!!..)
1971 350 (Incoming!!..)
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Old 03-26-2023, 11:27 PM   #12
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Re: Adding Power Steering Box - Bolt right up to frame??

Quote:
Originally Posted by Yamariv View Post
Interesting, no issues with the 67-72's?
Not that I can recall. I took the ps box from an 84 and installed it in my 70. Direct bolt in. The 84 frame had a crack under the steering box though.
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Old 03-26-2023, 11:41 PM   #13
geezer#99
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Re: Adding Power Steering Box - Bolt right up to frame??

Make sure to check the rag joint splines and their shape are the same.


https://content.speedwaymotors.com/D..._optimized.jpg
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Old 03-27-2023, 09:59 AM   #14
Yamariv
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Re: Adding Power Steering Box - Bolt right up to frame??

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Originally Posted by dmack91 View Post
Not that I can recall. I took the ps box from an 84 and installed it in my 70. Direct bolt in. The 84 frame had a crack under the steering box though.
Interesting!

For rag joints, my understanding is there are two spline options. The box is here now so I'll count the splines today
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1971 Chev C10 - 250ci L6 w/3 speed on the floor

Upgrades: Power Steering
3 Core Radiator
7 Hole Gauge Cluster
Power Brakes (Incoming!!..)
1971 350 (Incoming!!..)
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