'60-'62 used a torsion bar ifs on all models. C10-C40 had the bars attached to the lower control arm, similar to the '88-'07 4x4 trucks as well as S10 4x4s. C50 and up used a different system, with the torsion bar mounted to the upper control arm and running on the outside of the frame rails. That setup is very similar to the setup found on '80s-'90s Toyota 4x4 trucks with ifs.


Bill Burmeister