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74 steering box conversion

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Old Jun 26, 2021 | 01:10 PM
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74 steering box conversion

I have a 74 f250 4x4 highboy that I am installing a 78-79 power steering box and front axle with disk brakes.
I bought a plate kit from ebay but how do I know where to drill the holes. I assume that to far forward or back and the box will not be centered.
Any specs out there.
 
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Old Jun 26, 2021 | 03:24 PM
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Lots of these done, nobody knows
 
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Old Jun 26, 2021 | 03:28 PM
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Originally Posted by TOM B1
Lots of these done, nobody knows
Its a Saturday afternoon, most of us are out working on our trucks and not checking the forum. Give it more than 2 hours and you’ll probably give it a response.
 
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Old Jun 26, 2021 | 07:30 PM
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I mocked mine up and then turned the wheels to lock both ways to make sure I could before hitting anything. Pictures of your work notching the frame?
 
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Old Jun 26, 2021 | 07:41 PM
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Originally Posted by TOM B1
I have a 74 f250 4x4 highboy that I am installing a 78-79 power steering box and front axle with disk brakes.
I bought a plate kit from ebay but how do I know where to drill the holes. I assume that to far forward or back and the box will not be centered.
Any specs out there.
The kit on Ebay with the four flat pieces and the spacers? Where did you cut the notch?
 
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Old Jun 26, 2021 | 07:48 PM
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I did not cut anything yet, looking for info on the cuts and where to mount the bolt hole plate, or should I install the 79 disk brake axle first the take a rough guess...hmmm
 
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Old Jun 26, 2021 | 10:43 PM
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Install the axle first!
 
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Old Jun 26, 2021 | 10:54 PM
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Originally Posted by TOM B1
I did not cut anything yet, looking for info on the cuts and where to mount the bolt hole plate, or should I install the 79 disk brake axle first the take a rough guess...hmmm

Shouldn't need a rough guess, if you bought the kit I referred to above one of the plates is used as a depth gauge for the notch.





Is this what you bought? Bracket Kit
 
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Old Jun 27, 2021 | 11:27 AM
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Yes thats the kit I bought. but no instructions, dont want to f it up.
 
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Old Jun 27, 2021 | 11:43 AM
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Originally Posted by TOM B1
Yes thats the kit I bought. but no instructions, dont want to f it up.
This shows the location of the holes. 72 Highboy, Added 78 Power Steering - The FORDification.com Forums


I see you are also installing the front axle. What are you going to use for the drag link? When I did mine to keep the geometry right I had to install a 3" steering block as I couldn't find a Ford raised steering arm. I made the drag link using GM the rods and sleeve.

Here is the steering block, note it's Ford specific.

https://www.ebay.com/itm/25234905578...hoCfMwQAvD_BwE
 
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Old Jun 27, 2021 | 03:17 PM
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when I bought the axle and box the guy said everything is there for the swap, it looked like the frame crossmember was already cut, but was a botched up job.
I did not see that block but it has the drag link with the parts. I wanted to do it right with the plate kit
 
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Old Jun 27, 2021 | 07:44 PM
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Is the “new” axle a low pinion (1976) a high pinion (1978-79)?
 
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Old Jun 27, 2021 | 07:48 PM
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Originally Posted by TOM B1
when I bought the axle and box the guy said everything is there for the swap, it looked like the frame crossmember was already cut, but was a botched up job.
I did not see that block but it has the drag link with the parts. I wanted to do it right with the plate kit
The drag link won't work in your highboy. To get the steering steering arm in plane with the pitman arm you will need a block.
 
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Old Jul 3, 2021 | 09:21 AM
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Here is what I got, axle, springs, steering box,steering shaft,drag link
 
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Old Jul 3, 2021 | 09:55 AM
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Originally Posted by TOM B1
Here is what I got, axle, springs, steering box,steering shaft,drag link
Now add 3" of drop to the steering and you will quickly see the issue when installed on a highboy.
 
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