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Message: <blockquote data-quote="wash" data-source="post: 1143248" data-attributes="member: 18190">There will be a difference in power with different compression.I wouldn't spend the money on dish pistons either, you can't take advantage of the bigger boost and power potential in a stock block.Which brings me back to aluminum heads. What they lose with slightly lower compression (if you go for larger chambers), they make up for with increased air flow.  Unlike pistons, they are re-useable and repairable if anything bad happens. Lastly the heat flow characteristics of aluminum together with better combustion chamber design make them work well with a supercharger also.  A well chosen pair has no drawbacks beside cost and will be appropriate almost anywhere your build goes because one size fits many, you can compromise between what will work now and what you will do down the road without giving very much away in either build if you chose wisely.</blockquote>