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Thread: 406 build
          
   
   

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  1. #1
    bigdude's Avatar
    bigdude is offline CHR Member Visit my Photo Gallery
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    Sep 2005
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    Three rivers
    Car Year, Make, Model: 66 Nova SS 4 speed
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    Quote Originally Posted by 383 chev
    10.0-1 is a bit much for pump gas with iron heads i would take the heads to a machine shop and tell them what u want for a cam and they will get the springs to go with that cam and let them do the machine work. IMO you will lose some bottom end with the larger valves.
    My Michigan neighbor is right on with the 202's--If your not on it most of the time smaller valves will give you more grunt on the street!
    www.adoptafriendforlife.org

  2. #2
    erik erikson's Avatar
    erik erikson is offline CHR Member Visit my Photo Gallery
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    Aug 2004
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    clive
    Car Year, Make, Model: BLOWN 540 57 CHEVY
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    Quote Originally Posted by bigdude
    My Michigan neighbor is right on with the 202's--If your not on it most of the time smaller valves will give you more grunt on the street!
    With a 4.155 bore X 3.75 stroke he will have plenty of grunt.
    With over 400 cubes he needs a larger port volume and a larger valve size for this engine to make 440 hp.

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