[Burlyman]

I was wondering if someone could address the significant changes and differences in the chassis construction, drivability, and certain features like IFS, etc as each model has evolved into the next.  Although my budget will probably have me looking at a late 80s to early 90s model, I am quite sure others would be interested to know how things progressed through the decades.  Obviously, things like propane disappeared and slide-outs became a norm, 8v92s were replaced with s60s and other engine offerings, but what where the things that made each model a "wow" improvement over the previous model designation?