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Old 09-03-2019, 11:01 PM   #1
colgad
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Wanting to add Power Steering on my 67 C50

Wondering if a 1980's C50 Steering box will fit my 67? I am willing to make modifications to get Power Steering.
I do not want to use the slave cylinder style box.

Thanks!
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1967 Orange and Black C50 6.2 Detroit NV4500, 2 Ton Pickup conversion in progress
1972 White, Chevy Blazer 2WD 67 Dog house 5.3 4L65 2016 Power Tour LH
1972 Silver, Vega Wagon 4.3L WC 5 speed,
1955 Red-Cream, Chevrolet Nomad, restoration on hold
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Old 09-04-2019, 11:07 AM   #2
Campbel45
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Re: Wanting to add Power Steering on my 67 C50

just curious.. is the slave cylinder power steering not desirable?
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Old 09-04-2019, 08:49 PM   #3
sweetk30
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Re: Wanting to add Power Steering on my 67 C50

more a handicap assist compared to a true p/s box these days .
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Old 09-05-2019, 03:45 PM   #4
colgad
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Re: Wanting to add Power Steering on my 67 C50

Quote:
Originally Posted by Campbel45 View Post
just curious.. is the slave cylinder power steering not desirable?
Agree to SweetK30, If I am going to go to the trouble, I would want a modern style box.

Thanks
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1967 Red, C10 Short Bed 6.0L T5 5 speed
1967 Orange and Black C50 6.2 Detroit NV4500, 2 Ton Pickup conversion in progress
1972 White, Chevy Blazer 2WD 67 Dog house 5.3 4L65 2016 Power Tour LH
1972 Silver, Vega Wagon 4.3L WC 5 speed,
1955 Red-Cream, Chevrolet Nomad, restoration on hold
2004 Black, Corvette Z06 LS6 convertible (Rock solid Fun) 2011/2018 Power Tour
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Old 09-15-2019, 07:21 PM   #5
rkn463
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Re: Wanting to add Power Steering on my 67 C50

Quote:
Originally Posted by colgad View Post
Wondering if a 1980's C50 Steering box will fit my 67? I am willing to make modifications to get Power Steering.
I do not want to use the slave cylinder style box.

Thanks!
I'm running a complete 89 frame and running gear. The box from the 89 has different holes in the frame but the lines clear, etc. one thing I found out recently is that the trucks with the heavier front axle have larger linkage and joints so look for one from a truck with the same axle you have. In my case both the 68 and the 89 listed F050 (5000 lb) front axle. I hope all of this makes sense.

-Richard

PS, when it turned out that my original box was contaminated with brake fluid, I snagged one off of an 86 GMC school bus and it was identical to th e 89 C60 that was my donor. Hopefully that will open up some more options for you.
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Old 09-15-2019, 07:49 PM   #6
sweetk30
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Re: Wanting to add Power Steering on my 67 C50

fyi i did a 4x4 axle swap with original napco axles from 1969 c60 and put them under a 82 or 83 c60 truck . all i had to do was open up the tapered hole a little bit with a 1.5" per foot reamer that all the 4x4 guys are using for offroad buggy builds .
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85-k30lb the plow machine build .
85-c10sb summer fun toy .
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Old 10-13-2019, 09:30 PM   #7
Campbel45
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Re: Wanting to add Power Steering on my 67 C50

Colgad, did you end up finding anything to work?
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Old 10-24-2019, 10:47 AM   #8
Dannny B
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Re: Wanting to add Power Steering on my 67 C50

I'll write down what I've learned about power steering. There basically 3 types of hydraulic assisted steering.
The well known Garrison steering uses a valve on the steering link to meter pressure to a slave cylinder on the center drag link.
The most common steering arrangement on trucks nowadays is the unitized worm & sector box. On very heavy trucks, you will often see 2 boxes, one on each side. Normally this is on axles of 20,000 lbs and up.
The third type of power steering box has 2 hoses to the box and, an internal metering system. It also has 2 hoses out of the steering box that go to a slave cylinder. This was a common system on the early Chevy trucks.
Sometimes the slave cylinder was on the center drag link, as used on the Garrison. Sometimes, it was on the steering link between the pitman arm and the steering box arm.
Most steering boxes have the sector shaft at the top of the box and, the worm shaft at the bottom. This allows a fairly short steering arm.
The box on my Chevy has the sector at the bottom and, the worm shaft at the top. I bought a good box but, the arm was too short.
Looking at OEM Chevy boxes in the early years show a very long arm that should make the conversion easy.

I already mentioned that my truck has a horrendous death wobble that will throw you across the cab and, the truck goes insane.
I tried various caster angles.
I made a big heavy link that connects from the leaf spring cap to the frame.
I put on a huge steering dampner.
I took off the new nylon tires that had about 3/8 inch of runout and, put on the old, worn tires.
These helped a little bit. The truck still makes a hard left when it goes crazy. I slam on the brakes and, come to a stop out in the center lane,,, if I'm fortunate enough to be on a wide street .As I improve things, the wobble comes in at a higher speed. You can understand why I don't want to drive it.
I've come to the conclusion that I need to change to power steering to stop the feedback from the steering arm to the steering wheel.
I'm afraid that; if I put on the Garrison unit, the feedback will be amplified by the spool valve on the steering link. I need to put on the box with 4 hoses and, a slave cyl.

The box number is 5690653
https://www.mylittlesalesman.com/197...et-c60-9586567

Last edited by Dannny B; 10-24-2019 at 10:48 AM. Reason: lost attachment
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