In response to the question on 354s in 57/58 Plymouths. Mike Sealey is correct on his answer except add an optional 354 non-hemi to "some" 58 Dodges in Canada. The D501 57 Dodge did have a full race 300B engine with 10:1 compression ratio and all with a "sleeper" horsepower rating of 340. There were 101 built. The full race 300B engine had, for the first time ever, more than 1 HP/cubic inch ratio at 355 HP.
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