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Thread: 621

  1. #1
    Senior Member DYNO OPERATOR
    Join Date
    Jan 2004
    Location
    central Illinois
    Posts
    459

    621

    My 622" had 14.5 degree EPD/Brodix Pontiac style heads with 460 CC intake ports that flowed 480+cfm and 2.45" intake valves.

    On a true Chevy Head RFD/Edelbrock heads are some of the best flowing.

    That being said, if I already had a good set of Big M 410 cc heads, I would perobably use them if the pistons were compatable and then get a custom cam designed for that combo. A good intake sized for that size engine would be a plus too.

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Jan 2004
    Location
    central Illinois
    Posts
    459

    621

    Sorry, my post was supposed to be for the guy asking about heads for a 621.
    OOOPS.

  3. Racing Junk


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