Ford 272 C.I. runs low 11's. Why do Mopar guys need 408's?

Since ford is main topic...this is a 64 falcon me and my best friend are building...(his car) 1964 falcon Coyote lll gen with 98mm turbo...he is going 4 link 9"...10.5w....oh yeah...lenco...gonna be funnnn

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