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6 Cyl, 250 cid
- integral intake manifold
- Without integral intake manifold
8 Cyl, 305 cid (5.0L)
8 Cyl, 350 cid
- EGR
- Without EGR
8 Cyl, 400 cid
8 Cyl, 454 cid
- EGR (VIN S, 3rd digit)
- Without EGR

Engine Assembly for 1977 GMC C15

Fits: 8 Cyl, 454 cid EGR VIN S, 3rd digit (change)

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