There are 11 choices

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Automatic Transmission
- 6 Cyl, 250 cid (4.1L)
- 6 Cyl, 292 cid
  - TH350
  - TH400
- 8 Cyl, 305 cid (5.0L)
- 8 Cyl, 350 cid (5.7L)
  - diesel
  - gasoline
- 8 Cyl, 400 cid
Manual Transmission

Flywheel for 1978 GMC G25

Fits: Automatic Transmission 6 Cyl, 292 cid TH400 (change)

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