There are 14 choices

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6 Cyl, 250 cid
8 Cyl, 305 cid (5.0L)
- ID DD
- ID KE
8 Cyl, 350 cid (5.7L)
- diesel
  - AC
  - Without AC
- gasoline
8 Cyl, 400 cid (6.6L)
8 Cyl, 454 cid (7.4L)

Fan Clutch for 1978 GMC K15

Fits: 8 Cyl, 305 cid 5.0L ID KE (change)

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