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As cast, the JBP aluminum block weighs in at a scant 108 pounds and will be a few pounds lighter after machining. This compares to 186 pounds for a production 455.
Lightweight and Heavy Duty

 As cast, the JBP aluminum block weighs in at a scant 108 pounds and will be a few pounds lighter after machining. This compares to 186 pounds for a production 455.  View Related Article

 

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