207 307 209 309 407 508 etc. First number is chassis rating in tons. Last two numbers are hundreds and tens place of the horsepower of the engine. I've owned a 307d and a 409d.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

No, the cam alone will not increase power. You will have recalibrate the injection pump to make use of the additional airflow.

I have the injection pump off the 1980 also. Do you know what else would need to be changed?.
Thanks

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1979 300D.

The cam, cam towers, tappet arms and injection pump calibration, AFAIK.

Make sure the cam code is 05 instead of 00 or 08 so you know you have the right one before going to the trouble of changing it.