Adding a power box and replacing the original P/S on an early FORD should not change front end geometry.
What does change is the use of radial tires.
As said previously, you cannot MIDASIZE here. You need to find a quality knowledgeable shop or high performance shop.
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STEERING TROUBLESHOOTING
Power Steering Pressure
GM power steering pumps will produce up to 1,500 PSI. We recommend 1,200 PSI for
steering box applications and 800–900 PSI for Mustang rack & pinions. If a pump is generating too much pressure for the rack or box you are using, the steering will be over assisted resulting in twitchy
steering at speed.
This can be corrected by adjusting the pumps internal pressure valve. To properly adjust this pressure order part #899001-Pressure Reducing Kit.
Road Wander:
Vehicle wanders left/right without any definite input from the
steering wheel requiring constant small correction to drive straight.
• Low or unequal tire pressure.
• Steering linkage from column to box or rack loose or worn
• Front-end alignment out of specification. (Inadequate positive Caster)
• Steering box or rack worn or out of adjustment
• Steering tie rod ends worn or loose
No Recovery or Return to Center:
Vehicle fails to return to center after a turn or requires steering input to return to center.
• Binding of steering linkage or components
• Front-end alignment out of specification. (Inadequate positive Caster)
• Steering box or rack improperly adjusted.
Over-steering / Darting:
Vehicle over steers and is overly sensitive to all steering wheel input requiring constant correction.
• Excessive P/S pump pressure / mismatched components.
• Steering linkage from column to box or rack loose or worn
• Steering box or rack worn or out of adjustment
Lost motion at steering wheel:
Excessive free play felt in the steering wheel before the wheels begin to turn.
• Steering linkage from column to box or rack loose or worn
• Steering box or rack worn or out of adjustment
• Steering tie rod ends worn or loose
• Steering gear loose on frame
High Steering Effort in both directions:
An abnormal amount of force is required to turn the wheels in both directions.
• Low tire pressure
• Low P/S fluid level
• Insufficient P/S pump pressure and flow
• Excessive P/S fluid temperature
• Binding of steering linkage or components
Intermittent / Loss of power steering
After servicing the P/S system you experience either a loss of power steering or intermittent assist.
• Low P/S fluid level
• P/S Belt broken or slipping
• Air trapped in the P/S system
• Dirt or contaminants trapped in the P/S pump bypass valve
SOURCE- http://borgeson.com/Images/100th_Catalog.pdf
Changing To Radial Tires-
Most Factory Settings
(bias ply tires)
0.5 Negative Camber
0.5 To 1.0 Positive Caster
0.24 Toe-In
Good Street Performance Settings
(radial tires)
0.5 Negative Camber
3.5 TO 4.5 Positive Caster
0.10 Toe-In
SOURCE-
http://www.superchevy.com/how-to/cha...gnment-basics/