"The port volume is a little bigger than Edelbrock states in their advertising, but I don't think it will be detrimental. "
Don we used to have some serious debates here on how anything bigger than 185cc would kill even a 455's low end-so I couldn't resist
I would bet Edelbrock's casting is top notch also with little porosity. I know their Pontiac and 409 heads are.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune
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1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed