621

Old 07-02-2011, 07:15 AM
  #1  
markdunlap
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Default 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.
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Old 07-03-2011, 06:27 AM
  #2  
markdunlap
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Default 621

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