I just pulled the front caliper and rotor off the front of my 1994 F-150 2WD, reg cab, long bed. It was all yucky as I expected from a vehicle which has probably never been serviced (I recently bought it). So, I went looking for new SLIDE PIN calipers for my truck and NO ONE sells them. They only sold BOLT ON calipers. Then I ran across a comment in a Ford forum where a person said that slide pin calipers were for 1993 and earlier F-150's. Sure enough, when I went searching for a 1993 f-150 slide pin caliper there they were.
So, here's my problem - do I have a '93 spindle or a '94 spindle? It seems like I'm putting on a '93 caliper on my '94 truck. So, do I put on a '93 rotor or a '94 rotor (different part numbers at Advance Auto). The '93 rotors seem to be a bit thicker than the '94's (30.1mm vs 26mm). Discard thickness for the '93 and '94 are 28.45mm and 24.45mm. The bearings and oil seal seem to be the same for both years.
The door jamb label says the truck was manufactured in 4/94. VIN is 1FTDF15Y9RNB32579.

 

I didn't realize they had a substantial part change -the 92-96 should be the same (body type anyway).

I wonder if you had an early model '94 and left over 93 parts were installed? I don't know if that happens though.

I had 1992 console cupholder installed in my 1993 bench seat. I liked mine better than the '93 option though. I assume (even to this day) I got left over parts.

Maybe ​​​​​​@djfllmn has a though to share about your situation.

 

I did some more checking and found that the rotor and caliper part numbers at Advance Auto are the same for a 1986 F-150 and a 1993 F-150. The part numbers change for the 1994 F-150. This is kind of good news for me. The last time I was over to the U-Pull, U-Save lot, they had a 1986 F-150 with all brand new looking rotors and calipers. I didn't think I could use them because part numbers for the '86 and '94 were different. But, for my '94 with possibly '93 brakes it would work out okay.
It would be nice to know if there was someway to be sure I had '93 brake parts like maybe the spindle dimensions or something.

 

On a 2wd truck, the spindle is part of the steering knuckle, which is what the caliper attaches to, so if the '93 and older caliper is what fits, then the whole steering knuckle is for a '93 and down, meaning pads and rotors should be bought for a '93 and older.

 

What exactly is wrong with the current calipers? What test did they fail? They are NOT on the maintenance schedule, so until there's a specific problem with they, they do NOT need to be replaced. The whole truck is ~30 years old, so if you're replacing parts ONLY because of age, you should start with the whole truck.

If you just want to replace parts that need replacement, do THAT - the maintenance schedule says what those parts are. Have you read it? It's essentially the same as this for your '94:

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If they're just "all yucky", then that means YOU (& maybe the previous owner) haven't maintained it properly - read the PREVious page from that link. For nearly everything you need to know about the brakes on these trucks, read the relevant pages in this photo album:

(click this text)

 

The rotors had a big ridge on the top edge from being worn down. I figured if they were that neglected then so was everything else. Not to mention that the rear drum brakes were hooked up all wrong according to the Service Manual (WHICH I DID READ). It doesn't matter WHY a person wants to replace old or older parts. Maybe they just like to rebuild, renew or restore something old and neglected to a newer (safer) status.

 

Then why stop at the brakes? Why not renew the whole truck to a newer (safer) truck? And new parts are NOT necessarily better or safer than originals; to the contrary, many new parts are made cheaper & riskier than Ford specified for the originals, so replacing parts unnecessarily can make the truck more dangerous.

 

Did you ever hear of a "HOBBY"? I'm 78 years old and long retired. Working on my 1965 Galaxie and 1994 F-150 gets me out of my chair and makes me active. As I progress in my rebuilding process, I learn new things to keep my mind active. Perhaps you will understand when you are 78 and worried about your brain deteriorating from Alzheimer's and getting a heart attack from inactivity. I could be like most old folks and just sit in a chair in front of the TV all day long and wait for Death to come. But I find more pleasure over accomplishing rebuilding tasks and learning new things. An added bonus is taking my vehicles to local classic car meets each week and sharing thoughts and ideas with like minded folks who have their own cars they've worked on. So working on my vehicles provides physical activity, mental activity and social interaction with others. An added bonus is that I've made a vehicle in better condition than when I got it. As for safety, I drive within my county and on 30 mph roads.