'The 383' ~ Getting Those True Factory Horsepower Ratings

Nik-Nak,

Be advised, that the 1963, 1964 and 1965 - 383/330 HP Engines came thru with
a different Camshaft.

These were the same Camshafts found in the 1964 and 1965 - 426/365 HP
'Street-Wedge'

Lift ............. .431"/.431"
Duration ...... 268*/268*
Overlap ....... 48*
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In 1966, Mopar lowered the 383 to 325 HP and changed the Camshaft >

Lift ............. .425"/.437"
Duration ...... 256*/260*
Overlap ....... 32*
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In 1968 the 'new' 383/335 HP {Road Runner / Super Bee} Camshaft

Lift ............. 450"/.458"
Duration ..... 268*/284*
Overlap ....... 46*
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Back Information >

Originally, the 383 'Road Runner' Camshaft was supposed to have these 'specs'.

Lift ........... .450"/.465"
Duration .... 276*/292*
Overlap ..... 54*