Improving handling

[Bob Culver]

For a rough check with car on level ground, the facings of the axle where large radius rod nut sits represents the castor angle. may work off nut face or can undo nut one at a time and if the radius rod not twisted or untwisted in the process castor will alter little. With a level and perhaps a square the gradient  (1 in whatever as a fraction) can be established and the angle from sine or tangent table 2 deg .035, 4 deg .07 6 deg .105. Drills can be used as packers to obtain level.
The walls of the radius rods should be vertical but on the pre Girling cars with just the single big nut the rods can be twisted to some extent with a large Crescent or somesuch to provide some adjustment.