71 F-250, I do not recall a firewall mounted bracket for power steering on my 72 as it is factory. I did go out and look to be sure and there is nothing mounted to the firewall concerning the power steering unit. I know there is an extra bracket if you do a power brake swap as I had to find one for my 71 but I did not have to modify my stock bracket to make it fit. The power brake bracket I got came with the master cylinder and booster, it will use the two bolts just above the old master cylinder as well as the two bolts that were attaching the old master cylinder to the firewall. Hope this helps.

"bowties in the rearview mirror"

 

I've typed this same info many times on FTE

You won't find a 4WD P/S gearbox for any 1973/75 F100 or 1975 F150, because...there is no such thing.

These trucks were only available with Garrison Power Assist P/S. The manual steering gearbox is used, as it has nothing to do with Power Assist P/S.

Two long P/S hoses, pressure and return, route from the pump to the control valve. Two short P/S hoses, pressure and return, route from the control valve to the hydraulic cylinder.

First year for Ford integral P/S in an F100/150 4WD: 1976.

1973 was the first year FoMoCo offered P/S for F100/250 4WD's. Prior years, only manual steering was available.

 

Hi NOD and Number Dummy Bill, I have read all the posts and have a great amount of respect for your vast knowledge and willingness to share it. The truck in question is a 70 F100 2wd, the conversion article suggested that the manual steering firewall mount sits too low for mounting the column to mate with a 78 PS gearbox. There was a picture of two different firewall mounts. One was for manual steering applications and one was for PS and was stamped POWER STR or similar. I searched mid to late 70s trucks and didn't find anything like that on late 76 to 79 trucks. Was there a PS specific firewall mounting bracket made by Ford and what vehicles could I find one on? NOD's experince is that it is not needed, Thank you both for your experince and advice. I was able to figure out how to use a modified Suburban caliper mount to get disc brakes on my closed knuckle dana 44 in my 71 250 so getting PS in the F100 should be a cake walk.

 

Not sure on the 73 and later but the 67-72 2wd that I am familiar with, yes there is a different bracket for power than for standard steering. It is the bracket that connects the column mast to the firewall and it is different because the column angle changes.
The only F100 4x4s I changed were to change the whole body onto an F-150, so not much help there. But I have sold some of those parts and worked on them so I am familiar with the systems which has me scratching my head over this whole business about "reversing" the F-150 steering box to use on an F-100.

 

i have most of the major alterations complete on my 1970 crew 4wd. used a 1/2 ton 4wd setup. things i learned the steering shaft wouldn't clear my headers so i had to move or cheat up my steering column a little and angle my gear on the frame a little. it was a common sense type of situation. the next issue was the frame i had to modify and install spacer inside frame so when i tighten box down tight the frame wouldn't crush. the spacers will keep it tight and when running up and down dirts roads it will not come loose over time. on the front single bolt on steering box i just basically drilled hole and built a thicker plate behind frame so it wouldn't crack out over the yrs. i have photos in my photobucket of it mocked up. final thing was cutting the fender well for clearance to clear steering gear and shaft and headers. not hard work but tedious. any questions drop a message. keepin old iron alive one ford at a time. forgot to mention my tie rod was short and will have to modify and lengthen. haven't set down a sorted out why this is but its a simple procedure. i have a factory bronco tie rod system on my 3/4 ton 4wd 1970 on a dana 44 out of a 3/4ton 1977 4wd. still need to finish my front axle and getting close to the new link and custom radius arms. adios amigo.

 

Bill, I'm hoping you can help me out with some info about the bracket that mounts the column to the firewall for power steering in a 2wd 70 F100. What years had them, part number, and any availability (lol). Thank you for sharing your extensive knowledge on this forum, Kent.

 

Just finished the PS conversion on the 70 F100 2WD and it steers like a dream! Parts used are a 71 3 bolt 2WD box, a shortened coulmn (-2 3/4"), a modified firewall mount (holes down 1"), pump and 302 mounts from a truck, new hoses and belt. Bolted right up! I wasn't able to find the "correct" firewall mount or shorter column shaft at the UPAP so I worked with what I had on hand. My welder friend shortened the shaft and rewelded it, I redrilled holes an inch lower and groung some material off the top to clear the master cylinder. Keep old iron alive is a great way to be, I LOVE working on my bumpsides! FTE is the best. I am reminded of Bluto's immortal words "Did we just give up when the Germans bombed Pearl Harbor? NO" Sometimes we can't take no for an answer and that makes America great.

 

Wanted to post this seperately for clarity in the 4x2 / 4x4 confusion that seems to exist in this thread. My 71 4x4 conversion used a 78 Bronco box with the 4 bolt pattern, the drag link from same truck, a shortened intermediate steering shaft, pump and 390 mounts from a truck, and 2 pieces of 1/4" plate steel and 1" spacers to support the frame changes. I did need to remove some material from the top of the side frame where the box mounts. I cut and fit the plates to size and drilled for the mounts which was the hardest part. I was able to find the other parts at the UPAP for little money. I hope these part lists help others who would like to do these mods. Thank you to all at FTE

 

71 F250, glad to hear everything is working well for you. Nothing like getting it all done and moving on to the next project and the next project....etc. I have to start a gutter repair on my 71 before it starts to raining, not one of my favorite jobs but it falls into that next project and the next.. well enough of that, glad I could help.

"bowties in the rearview mirror"

 

Did you swap the worm gear with a later box, or just leave the pitman arm forward on the 78 box?
Thanks,
Tyler

 

you should look into the power steering convertion by benchwork steering systems in arizona heres a link http://www.benchworksteering.com/pow...conversion.htm they have f100 and f250

 

This diagram is not coming thru clearly. Anyone else having trouble? Please post pic again. Thanks! .......
1967 - 1972 (with 1973 - 1976 Supplement) 4 X 4 F100 POWER STEERING CONVERSION - Ford-Trucks.com

 

Hi faithtroopers, I also wasn't able to view the plate diagram from Alves just now. I remember though that I didn't really use it though. I used two pieces of 1/8 or 3/16 plate that I had in the pile of metal. After removing the old box I held the Bronco box up inside the frame rail and marked the rail to trim it. I notched the plate to fit inside the frame rail where it is needed. I cut the second plate to the height of the outside of the frame rail. I clamped both plates and the PS box together and connected the drag link to the pitman arm. This ensures that everything is lined up properly and moves freely. Also mark the position of the outside plate on the rail and reference to the inside plate. I used spray paint into the mounting holes of the PS box to mark the plate to drill mounting holes. With both plates drilled and clamped to the rail drill the frame rail, make the holes a bit larger than the bolt for some wiggle room to make assembly easier. I got grade 8 bolts nuts and washers at the hardware store, longer bolts also eases assembly. I did need to reposition the pitman arm but it rotates the proper direction. Some boxes rotate opposite and switching out the internal shaft between an CW and a CCW was needed. Check to use the right box or steering is backwards like steer right makes wheels go left, not cool!!!!! Hope this helps, not a hard job but some cut and fit was needed. FTE is great for finding out how to do things on our old trucks!

 

Does anyone still have the write up from NOD?? I’ve tried to message him and it appears he hasn’t been active in a long time. Trying to figure out if I need to have a gear box re worked to turn opposite direction or if I can just bolt on a 78-79 f150 4x4 gear box? My trucks manual box is pretty sloppy and hard to turn and i need to figure something out soon.

 

Hi Houston Highboy, 71 F250 here. I did a power steering conversion on both my 70 F100 now gone and my 71 F250 highboy. There is a lot of info out there and also boxes that are straight and reverse geared as well as 3 and 4 bolt mounts. Your post doesn't list the truck being worked on so I'm not sure what you need. The wrong direction box will make the steering backwards as in turn the wheel right and the tires go left, not at all cool. There are write ups on switching out the worm gear shaft in a box to the opposite thread worm gear but that seems a pain. If you look up what steering gear you need for your truck it should list whether it is straight or reverse geared. You can also look at your steering linkages and see if turning the steering wheel right turns the pitman clockwise (forward) or counter clockwise (reverse). When doing the jobs I just did a bunch of searches on doing a PS conversion for your specific truck. I remember I did have to reorient the pitman arm so it would operate the intermediate shaft properly. Hope all goes well, the info is out there if you look hard enough. I was able to figure out a front disc brake conversion for a closed knuckle dana 44 without welding a steel mounting bracket to the cast iron knuckle using junkyard parts. Let me know if you have more questions, maybe I can point you in the right direction. Kent