By the time you buy all new stuff and do them right with the cost of port work your right there with new aluminum heads. More modern combustion chamber and loss of nose weight. It's tough not to pull the trigger. I do my own porting and it's not hard to hit 250 at .550 the other 20 is time consuming and things start to get thin in places.
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Be carefull of the feet you step on today.They may be attached to the a$$ you kiss tomorrow.
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