...And here is what I found, in case anyone else cares:

http://www.epa.gov/otaq/crttst.htm

For an '81 300TD, these are grams/mile emissions:

Hydrocarbons: .20
Carbon monoxide: .82
Oxides of nitrogen: 1.3

For an '81 300SD, in grams/mile:

Hydrocarbons: .18
Carbon monoxide: 1.1
Oxides of nitrogen: 1.3