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400 sbc Double hump heads cast.
1971 sbc 400 ci.
.030 over bore
Extreme energy cam shaft hydraulic flat tappet. 268/280 Advertised duration
224/[email protected], 477/480 lift.
9.5 to 1 cr.
cast #186 heads, 2.02/1.60 vales
intake Edelbrock esp
1/2 open carburetor spacer
tested with a 770 and 950 cfm carburetors
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