"That thing gotta 273?"

pishta said

318's are bored out 273's......so were 289/302's. Which one will give you more power.

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302's and 289's use the same pistons, different rods and cranks. A 289 would kill a 302 any day of the week. My brother had a 65 Mustang with a K code 289 and 3.90 gears.