[Daves55Sedan]

There is much more to converting from manual steering to power steering. On both cars and trucks in the '50's, Fomoco designed a distinctly different spindle connecting rod which had provisions for mounting the ram cylinder and different mounting arrangement for the power steering idler arm. The trucks also had steering arm stop bumpers mounted on the frame, whereas the manual steering trucks did not have these. A special fluid control valve and drag-link assembly (different from the car units) was designed for the truck spindle connecting rod. The '53 and earlier trucks required a 3-belt crankshaft damper (V8), while the heavy duty series trucks having the overhead valve Lincoln Y-block needed a 2-belt damper. The power-steering pump/reservoir assembly mounted on a system of brackets on driver side of engine at the front and driven by its own dedicated V-belt. The reservoir for the trucks were different from the ones for the cars, but I believe could be swapped for F-1 series trucks with car reservoirs. The heavy-duty trucks with Lincoln Y-block had taller fluid reservoir and fluid cooling hose wrapped several times around the outside of the reservoir can. The pumps for all the cars and trucks themselves were originally the same, and can be replaced with an Eaton pump without any modifications to mounting, but may require some hose fitting modifications. Original reservoir and hardware will mount perfectly upon the top of the Eaton pump. If using the Eaton pump, it may be necessary to swap the original flat style pump pulley with a 1957 or later car "deep-dish" style pulley.
The only thing you don't need to change is the steering column and steering gearbox. This type of system really is not "power-steering". It is a "power-assist" system.