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Old 10-14-2009, 08:34 PM
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468 engine build

i have a 454 big block chevy generation IV want to get 450 horse in a 71 chevelle. it has 781 heads, plan to do some port and polishing, was wondering if i needed bigger valves. need to know what size carburetor, what type of lifters solid or hyd? and type of intake, what kind of cam was wanting to run a 9:1 compression ratio and i will bore it .060 over to make it a 468, im 18 years old and new to the game any help will be appreciated

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Old 10-14-2009, 08:54 PM
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Here is a cam & lifter kit that would be a good choice;
A dual plane intake such as the Weiand Stealth with a Mighty Demon 800 annular booster carb,here;
Dont bore it any more than is needed,its always a good idea to leave room for future rebuilds.
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Old 10-14-2009, 09:04 PM
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781 heads respond tremendously to 2.19 intake and 1.88 exhaust valves. blend all edges in the bowls and smooth the short side radius. Smooth the upper 1/2 of the exhaust ports.
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