The plug-in list from the 1976 182T manual (scanned by agilent);
Compatibility list from 1971 180 system brochure (doesn't include "T" S.A. variants)
The four oscilloscope outputs are not available on the "T" S.A. variants, instead has four Aux outputs, Z-Axis input is present on both.
Also note that certain plug-ins are
not recommended for use with the storage CRT variants 181 & 184. e.g. the 1601L logic state analyzer.
David