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!

Re: Wanting to add Power Steering on my 67 C50
 

just curious.. is the slave cylinder power steering not desirable?

Re: Wanting to add Power Steering on my 67 C50
 

more a handicap assist compared to a true p/s box these days .

Re: Wanting to add Power Steering on my 67 C50
 

Agree to SweetK30, If I am going to go to the trouble, I would want a modern style box.

Thanks

Re: Wanting to add Power Steering on my 67 C50
 

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.

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 .

Re: Wanting to add Power Steering on my 67 C50
 

Colgad, did you end up finding anything to work?

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

Re: Wanting to add Power Steering on my 67 C50
 

I have a 1963 GMC 930 (C-60) here with factory power steering...ex municipal fire truck-327/5spd with PTO/2spd rear/power steering and brakes (juice) 28000 orig miles. I will be using complete cab/doors and hood, chrome grille...will be liquidating the rest in pieces (will post ad in classifieds) once I get the cab off...