ingals for the best in camber bolts
when they mention this need for camber adjustment do they tell you what the present camber is?
many times the spring manufacturer will engineer in a slight decrease in camber, to say -1 degrees
this induced neg camber up to 1.5 degrees can actually increase handling levels and have very little influence on tire wear.
toe in is critical to tire wear, dropping the car far enough to get 1.5* neg camber will produce toe out, intolerable for long tire wear
it's toe out that causes extreme wear not slight neg camber
the rear axle can be bent to provide more neg camber and adjust toe
both the b15 and b16 share the solid beam rear end [semi-independent]
mine was bent at 1st to 1.2* neg camber and stock rear toe in

for high performance street use
try slight neg camber and up to 0* toe in [increased wear, but terrific response] and watch how differently your sentra responds
these cars are very sensitive to toe adjustments, use small changes till you get what you like
for racing purposes the slightest amount [1/4*] of toe out, will remarkably change turn in, on curve entry
for the dragracers with skinny rear wheels 1/8" toe in will make the car much more stable at high speed
shims for the b16 are supposedly usable on the rear
but i have never seen them