There are 9 choices

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6 Cyl, 231 cid
- VIN A (5th digit, even firing)
- VIN C (5th digit, uneven firing)
8 Cyl, 301 cid (4.9L)
- VIN W (5th digit)
- VIN Y (5th digit)
8 Cyl, 305 cid
8 Cyl, 350 cid
- VIN P (5th digit)
- VIN R (5th digit)
8 Cyl, 400 cid
8 Cyl, 403 cid

Engine Assembly for 1977 Pontiac Laurentian

Fits: 8 Cyl, 400 cid (change)

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