First Generation Firebird-L Mailing List ......................................................................... Dion,
I am usually the one who takes no prisoners regarding my opinions... In my opinion, you should go with the big valves. I am not a fan of the 4x 6x heads. they came from a time when the engines were being choked from the factory. Here I go...they are crap. Yes you can massage them, but they are still smog heads... people get them because they are a cheap start and are lured by the 2.11 intake valve. Don't be fooled ! Now let's think this through.... An engine is an air pump. A 455 is a fairly BIG air pump that needs to move a LOT of air. Compression equals power. The factory knew this during the muscle car prime and compressed these motor to make power. Then dropped compression to kill power... READ this... http://blogs.hotrod.com/6253885/editorials/hot-rod-engine-tech/index.html and it is from Pontiac guys... Now, let's say you go get yourself a set of GOOD iron heads, 670's 13's 16's 62's 48's, they will run you about $350+ for good cores (shipping too?). Then you may need all new valves($200+), springs (for sure $100+) maybe a few seats plus labor (2-$300)oh and guides too. By the time you resurrect the "old" heads, you might as well buy a set of edelbrocks... If you go the iron route, get a set of 67-70 big valve heads. Use the 6x's to chock your wheels. The only reason the go with the 'good' iron heads is the stock look or resto.... it's a pay me now or pay me later proposition, old heads will bleed you slow, hundred dollar you to death....new heads, bada-bing bada-boom. done. My opinion ? get the small chamber edelbrocks, and a nice solid lifter 106-108 (read: tight) centerline cam. then go pull houses off their foundations with all the torque you will make!!!! Banzi !!! joe ------------------------------------------------------------------------ Submissions to Firebird-L: <[email protected]> Unsubscribe from Firebird-L: <[email protected]> Help: <http://FirstGenFirebird.org/firebird/Firebird-L.html> Classifieds: <http://FirstGenFirebird.org/ubb/> Owner Pictures: <http://FirstGenFirebird.org/show/>
