OP should replace all the bearings, bearing cups, steering shaft and worm, both seals and the gaskets. No one has the sector shaft. Doing a half assed repair is not the way to properly fix the steering.

All the parts are listed in parts list #1 in post #11.

 

OP already stated he has ordered bearings, seals, worm gear etc. Right you can't buy a sector shaft but you can buy the gear..

 

OP said initially he's buying two seals and two bearings from Rock Auto.

Now he's added the worm gear for the steering shaft, there is no replaceable gear on the sector shaft.

Ford did not sell worm gears by themselves after 1947, so where C&G is buying them from, I dunno. The old Gemmer steering gear plant in Detroit is a torched by arsonists burned out shell.

On the other side of the Edsel Ford Freeway from the Gemmer plant, is the former Packard assembly plant, the largest industrial ruin in the world.

 

As I posted a link earlier to Midfiftys kit, it includes a sector gear and all the bearings, bushings, seals etc. I don't know who makes the gear for them, I've also seen them on other sites. Carpenter sells a similar kit that includes the sector gear.

 

Terminology again, we say rumble you say catch.
Well I got the parts from Rock Auto the bearings were wrong and the two seals are the same just different brands and called different names.
I guess the bearings were for a power steering box never mind my old ones were good.
I managed to remove the old gear from the shaft with a press, I dropped a collar down the steering shaft turned the shaft upside down, the collar held the gear and I used a pin to push the shaft downwards through the gear.


I ordered a new gear from Mac's, managed to get my shoebox hood springs and hood bumper kit at the same time.
The new gears are made in Argentina.

At this point I had a panic attack the inside splines were different in each gear, both gears were marked 88, this was going to be one hell of an interference fit.

I had a mug of coffee whilst I plucked up the courage to fit the new bearing.
The keyway and the splines are only present at the bottom of the gear they run maybe half the way up the inside of the gear, the top half inside is circular maybe a slight taper.
A test fit put the gear on the shaft far enough for the keywayy to locate and the flat splines to start to grip the steering shaft splines.
I wrapped emery paper around the steering shaft and locked it in my vice, I had another coffee.
Three blocks of soft wood on the floor and the steering wheel nut on the thread I lowered the shaft to sit on the blocks, locked it back in the vice.
Another coffee, I read so many threads about this gear change I wanted to take my time.
The time had come I only had a hot air gun for heat so spent 10 minutes heating the gear on an anvil then I picked it up with a rag located the keyway on the shaft and beat it with my copper mallet.......

5 minutes later job done, now its all refittted, the box is back on the truck and the steering is beautiful.
I actually had 5 1/3 turns from lock to lock so with the steering shaft keyway at 6 o' clock when I inserted the sector arm and 2 1/2 and a bit to center the pitman arm was at 6 o' clock and all is good.

I have steering lock adjuster bolts on the spindles that hit the I beam to stop further travel I may wind these in a bit to get a better steering circle.

Thanks for your input folks, job was not as hard as I had been led to beleive, shipping cost $110 which Is why I ordered the gear only.

 

Well done! I'm glad you have good steering now. Just for your info there was no such thing as a power steering box for these early F100 type trucks. Can you explain how the change of he sector shaft gear went? I didn't change mine and may do it next time I rebuild mine if I live that long. Also I wouldn't change the spindle stops, that may cause the sector gear to travel too far and override the worm gear and cause chipping of the gear, don't really know of that being possible, just a thought..

 

I used the my same sector shaft and gear as it was chip free with good faces it was only my steering shaft gear that was chipped.
I think there is more work involved with replacing the sector shaft gear so I was lucky.
I didn't think about the sector gear travelling to far, so I will check it all again I may actually wind the spindle stops out as I've read there should be 4 1/2 turns on the steering wheel

 

OK, thank you..