according to the factory service manual there are still camber and caster
adjustments on the 4wd and 2wd trucks as i suspected. (i havent worked on
the suspension of the DR trucks so i had to look to be absolutively sure)

Your 4 wheel alighnment should actually be a "Thrust angle alighnment" there
are no adjustments on a leaf spring suspension in the rear, but you can
measure the "Thrust angle" or the way the rear end sits in the vehicle and
adjust the front end to compensate (your actually alighning the car to the
way it gets pushed down the road). i hope that answers your question on 4
wheel alighnments.

You get more numbers on the printout than with a 2-wheel alignment.

-rev

I have no idea, but i brought my 2wd 98 dodge dakota pickup into NTB
for new tires and alignment.   I read over the printout afterwards and
notice that only the toes and cambers (front tires) were adjusted or
changed.....I asked why the casters were not adjusted, even though
they
are out of the proper range (according to printout), and the front
desk
guy said he didn't think they could be adjusted (I didn't talk to the
alignment guy because the place was closing that night....I'll
probably
go back...but first I want to become a little informed before doing
that).     Drove the truck home and it handles quite well,  but ......
still think they were probably just cutting corners (?).     I do
remember the same thing happening about 5 years ago...NTB said
something to the effect that "not good to adjust the casters....can
throw off the toe"  (or something vaguely similar to that).
p.s. Left caster is 4.9 but the correct range is: 2.5 to 3.5
      RIGHT caster:  same as above

Actually, i don't know if they did a good job with the camber and toe,
because they certainly didn't move the numbers anywhere into the
CENTER
of the correct ranges, although they did put everything into the
correct ranges (but on the "edges" of the range, in some cases, if you
know what I mean).