steelsixpack101 steelsixpack101 is offline
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Join Date: Aug 2006
Location: Mankato, MN
Posts: 41
adding a 256-268dur. cam/dual plane intake and small tube headers will really wake up that 454 up!, if you wanted make even more power in the future,you can buy a cheap set of 781's or 049's on ebay for $100-$200 and just use your old valves from your 236's. my two cents

A couple problems.....if you're talking duration at .050, way too big for a stock engine. This will kill the performance. And the large chamber 781's or 049's wont do any good without a c/r increase. A set of closed chamber heads would be a better choice, try and get the cc's down to 100 or maybe 98cc....this will give a little boost in the c/r. Large chambers and flat top pistons are not a performance build. Dual plane intake and headers were mentioned, but dont go too big on the headers, 1 3/4" are perfect.