Thread: How pissed should I be, 454 instead of 427

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Originally Posted by Dago Red

so these heads I read are only good to about 550hp. but I figured to go up we'd have to change heads. the external balancer, it's on the back side right?

you may be looking at doing more then heads if your pushing past 550 hp . yes you will see the counter weigth on the fly wheel and its on the back of the damper as well and all stock GM ex balancers are 8 inch thats one of the fast ways to tell if its a 454 but the hp 427 did use the 8 is well with no counter weight in the427 damper.if you have a stock gm 454 crank in less someone did alot of work to it...then it will need a ex fly wheel and damper