2 questions 1972 steering swap and F shims

[saon]

1st does anyone know what the thickness is of the F shims?
I see that each side takes 2 F shims, I'm sure I could use any shim but I'm guessing the fenders are a set gap of 2 shims when the inner is installed? not just a random spacing?

2nd I swapped a '85 square body power steering box into a '72 c20.
works good about 1 3/4 turn lock to lock. but the turning radius is very wide now. I have to Y turn to get into my shop where prior i didnt have to.
what am I missing? or is it normal?

thanks.