As posted above, when referring to engines, the terms/names referred to different engines.

For example:

1953 Chevrolet trucks:
Thriftmaster = 216
Loadmaster = 235

1954 Chevrolet trucks:
Thriftmaster = 235
Loadmaster = 235
Jobmaster = 261

1959 Chevrolet trucks:
Thriftmaster = 235
Thriftmaster Special = 235
Jobmaster = 261
Trademaster = 283
Taskmaster = 283
Super Taskmaster = 283
Loadmaster = 322
Workmaster Special = 348
Workmaster = 348