'The 383' ~ Getting Those True Factory Horsepower Ratings

Mopar 383 ~ 4-Barrel

With Timing Set @ 35* Total Advance

Year ............ Advertised HP ............... True Factory HP

1963 .................. 383 ~ 330 HP .................... 285 HP

1964 .................. 383 ~ 330 HP .................... 285 HP

1965 .................. 383 ~ 330 HP .................... 285 HP

1966 .................. 383 ~ 325 HP .................... 278 HP

1967 .................. 383 ~ 325 HP .................... 278 HP
1967 .................. 383 ~ 280 HP {A-Body} ...... 271 HP

1968 .................. 383 ~ 330 HP ..................... 288 HP
1968 .................. 383 ~ 300 HP {A-Body} ...... 283 HP
1968 .................. 383 ~ 335 HP ..................... 303 HP > {Road Runner / Super Bee}

1969 ................. 383 ~ 330 HP ..................... 288 HP
1969 ................. 383 ~ 330 HP {A-Body} ...... 295 HP
1969 ................. 383 ~ 335 HP ..................... 303 HP > {Road Runner / Super Bee}

1970 ................. 383 ~ 330 HP .................... 288 HP
1970 ................. 383 ~ 335 HP .................... 303 HP > {Road Runner / Super Bee}

1971 ................. 383 ~ 300 HP ..................... 299 HP > {w/Holley Carburetor}