Super A steering knuckles tipped. Which way?

I was changing out my front tires on my "48 Super A when I noticed the axle extension knuckles were both tipped. The right one is tipped back (toward the rear) and the left one is tipped forward (toward the front). Years ago it was run with the clamps loose so the pinholes are a little elongated. The bushings are good. So my question is, should the axle extension knuckles be tipped forward or backward or should they be strait up and down (perpendicular to the ground)?
TIA
Dave
 
Tipped back 1 to 2 degrees is good. Straight is OK tipped forward is not good. They need to have caster. Like a bicycle, the top back the bottom forward. This causes the steering to tend to go straight and wobble less. Jim
 

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