Most of the computers were 0 280 000 017 or 034.

The 017 computer was used on:
1971 B20E
1975 B30F

The 034 computer was used on:
1972/73 B20F

There are some others listed below:
The 009 computer was used on:
1970 B20E
1972/74 B30F

The 016 computer was used on the 1974 B30F with auto tranny in California only.

To the best of my knowledge all of these computers are basically interchangeable
but you might want to check and be sure you have the corresponding MAP sensor
for the computer you have. Post a response if you need those numbers.
--
George Downs Bartlesville, Heart of the USA!