ididit Retrofit Steering Column: 1955-59 Chevy Truck - Manual (Page 7)

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1. The front wheels must be pointing straight forward with the steering toe
set reasonably close.
2. Rotate the input shaft of the gearbox or rack from lock to lock and set the
box exactly half way between. For example, if the shaft rotates three full
turns from lock to lock. The center will be at 1½ turns from either locked
position.
3. Install the steering arm and drag link, and adjust tie rod ends to get the drag
link to fit without moving either the box/rack or the front wheels. Rotating
each tie rod end the same number of turns will preserve adjustment.
4. With the column mounted in position
and two joints are used on a shaft,
the forks of the yokes closest to
each other should be in line, or “in
phase”. Premature wear or binding
can result if the u-joints are not
phased properly. Sometimes if the
u-joints are at a severe angle, even
if they are phased correctly, a hard spot in the steering may occur for no
apparent reason. If this happens, index the u-joints two or three splines in
one direction. The hard spot should disappear or be minimized.
5. Install the shaft or joint on the gear box/rack. Leave the upper part of the
shaft unconnected for the time being.
6. Position the column housing so that the signal switch arm is level to the
left hand side.
7. Install the column through firewall, into your joint.
8. To properly synchronize your column, the completed column installation
should look like the diagram below. If the post on the horn cam is not at
10:30, turn it until it is at the 10:30 position . Once completed, your column
will be in sync.