Pontiac 421

-7cc Flat Top Pontiac Early and Late
Chamber Comp Ratio
62 12.1 to 1
87 9.41 to 1
124 7.18 to 1
(1)
-7cc Flat Top Pontiac Early and Late
Chamber Comp Ratio
62 12.26 to 1
87 9.51 to 1
124 7.26 to 1
(1)
-7cc Flat Top Pontiac Early and Late
Chamber Comp Ratio
62 12.29 to 1
87 9.53 to 1
124 7.27 to 1
(1)
-7cc Flat Top Pontiac Early and Late
Chamber Comp Ratio
62 12.39 to 1
87 9.62 to 1
124 7.35 to 1
(1)
-7cc Flat Top Pontiac Early and Late
Chamber Comp Ratio
62 12.45 to 1
87 9.66 to 1
124 7.37 to 1
(1)
-7cc Flat Top Pontiac Early and Late
Chamber Comp Ratio
62 12.53 to 1
87 9.74 to 1
124 7.43 to 1
(1)
-14cc Dish Top Pontiac Early and Late
Chamber Comp Ratio
62 11.2 to 1
87 8.87 to 1
124 6.88 to 1
(1)
-14cc Dish Top Pontiac Early and Late
Chamber Comp Ratio
62 11.32 to 1
87 8.97 to 1
124 6.96 to 1
(1)
-14cc Dish Top Pontiac Early and Late
Chamber Comp Ratio
62 11.35 to 1
87 8.99 to 1
124 6.97 to 1
(1)
-14cc Dish Top Pontiac Early and Late
Chamber Comp Ratio
62 11.45 to 1
87 9.08 to 1
124 7.04 to 1
(1)
-14cc Dish Top Pontiac Early and Late
Chamber Comp Ratio
62 11.5 to 1
87 9.1 to 1
124 7.07 to 1
(1)
-14cc Dish Top Pontiac Early and Late
Chamber Comp Ratio
62 11.57 to 1
87 9.18 to 1
124 7.12 to 1
(1)

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