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Message: <blockquote data-quote="jabird" data-source="post: 900359" data-attributes="member: 12524"><p>Interesting questions, but not sure where you are going. Are you planning on rebuilding the 4.6? The block and crank are good for 500 hp, but you'll want all new pistons and rods. Do some research before you make a decision, you're talking about a complex motor and expensive parts. For example, Diamond makes awesome pistons designed for boost. $600.00 for eight. Manley rods and bearings cost around $550.00, and you still need to have the crank and heads done. If the block is bad, you'll be looking for a new motor anyway.</p></blockquote><p></p>