1954 Merc powere steering conversion.

[Daves55Sedan]

Those are only the hydraulic parts Dave. He would still need all of the linkages and brackets.

That's correct. But sometimes you can find complete used OEM power assist systems on e-pay. They're dirty/rusty and need rebuilding, and you need to make sure you are getting the right idler-arm assembly and bracket.
I myself sold a complete and restored power assist system a couple years ago to someone who frequented this site.
It's best to get one for the exact year and make of your car. Don't buy one for a '53 flathead because the pump brackets won't fit a Y-block. You may be able to get away with a 54/55/56 Ford assembly, but the idler arm and bracket might not work. Make sure it comes with the add-on crankshaft pulley and longer center bolt.

 

[KULTULZ]

That's correct. But sometimes you can find complete used OEM power assist systems on e-pay. They're dirty/rusty and need rebuilding, and you need to make sure you are getting the right idler-arm assembly and bracket.

I think what is causing the confusion is the kit I showed. That was for illustrative purposes only and gives a complete parts list for a 54 MERC install.

The chances of finding a NOS kit will likely be nil but stranger things have happened. And the chance of finding a correct donor with all correct origional parts is also going to be a challenge.