TR3 Front suspension

["Mark York" <m-syork@comcast.net>]

What is the recommended and most effective way to add negative camber to the
TR3 front suspension? In Kas' book he offers 4 methods to increase negative
camber.  It would seem that slotting the upper A arm to move the ball joint
in would allow for camber adjustment rather than cutting out a section out
of A arm . Are there any other methods available (keeping in mind the
"spirit" of Vintage racing)?  Has anyone used later front suspension pieces
from a TR4 or TR6?
Thank you
Mark