Instructions for Caster/Camber Gauge Part numbers
 78250, 78260, 78262, 78264, 78266

Always read at the center of the bubble.
Camber is marked in 1/4° + and - .
Turn wheels 20° to R & L when setting caster.

Find a flat, level place to set up your front end.
Attach the gauge to the spindle. If you have a magnetic adapter, be
 sure that the surface you attach to is machined square to the spindle
 and doesn't have any nicks or burrs. With the thread-on type adapter 
be certain the spindle threads are free of burrs. Usually there are a
 few extra threads on the spindle. If not, you will need to remove the
 spindle nut and install the adapter in its place.

Rotate the gauge until the small vial at the end of the gauge shows level.
Read the camber directly on one of the two vials on either side of the
 gauge. Note that they are marked + and - . Read the line nearest to the 
center of the bubble. Each line is 1/4°.
To read caster first turn the wheels 20° out so that the front of the tire
 is farther from the car. If you don't have a set of turning plates you can
 use the angles machined on the corners of the gauge. Turn the wheels so 
that the angle near the adapter end is square with the side of the car
 and the angle at the other end is parallel to the side of the car. Rotate 
the gauge until it is level.
Turn the knurled knob in the center until the caster part of the gauge reads 
0°. Now turn the wheels back to 20° the opposite way. Rotate the gauge again 
to level and read the caster on the center vial (read to the center of the 
bubble). Each line is 1/2°.
Adjust the caster and camber as needed. Each time you make a change bounce 
on the front end to settle the suspension. Remove the gauge and reinstall
 the spindle nut as needed.
Note: Adjusting the caster may have an effect on the camber and vice versa.
 Double check all your settings before finishing. Be sure to tighten all 
suspension bolts when done.
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Avanti (May 2009)
Caster, +1/4" to -1 1/4" with no more than 1/2 degree variance between wheels.

Camber: 0 to +1 with 1/2 degree more + on drivers' side.

Toe-in: with left wheel straight ahead, and gear on high spot, adjust right tie rod to
 1/16 to 1/8 on Power Steering cars.


Richard Gahlbeck
Ferndale, WA    http://forum.studebakerdriversclub.com/topic.asp?TOPIC_ID=28909

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May 2009
If you jack your front up by the frame the unequal control arm length will pull your wheels in at 
the top(negative). It goes positive as weight is applied. Positive caster gives more negative
 camber at outside wheel in a turn, with negative caster it will go to the positive side. Inside 
wheel does the opposite. Negative caster with positive camber can lead to a understeer, for which
 cars in the fifies are noted. Negative camber will put more of the load on the smaller outside
 wheel bearing which may shorter it's life a bit, but not a big concern. Positive camber puts 
center line of tire closer to kingpin center line reducing scrub radius. 1/2 degree either side of
 zero shouldn't make much of a difference.(may increase reaction to pulling brakes,low tire or 
blowout etc.)
I run 2 degrees positive caster with 1/2 degree negative caster. No understeer and no abnormal
 tire wear at 8500 miles
You may not be able to get caster to positive side without some modification.

leyrret http://forum.studebakerdriversclub.com/topic.asp?TOPIC_ID=28909