Quote:
Originally Posted by Grey Ghost
Believe it is a 66 Coronet hemi. 8.60 lbs/hp factor @425hp...natural B car. With the aluminum head 430hp rating the shipping weight to hp factor is 8.49 and would be a natural A combo. Just saying it can be confusing.
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No, that's not the way it works. If you run the aluminum head, you have to carry the extra weight but you still run the same natural class.