[lt155ruck]

I'm sure this has been covered a number of times but for the life of me cant find the info I want. I have a 72 factory 2wd Blazer with obviously a coil spring setup. Are the truck coil spring rears the same width? My non posi 12 bolt is howling like a hound dog at a full moon and have a line on 72 posi with 411s from a truck. I'd appreciate any help