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Message: <blockquote data-quote="94 DropTop" data-source="post: 812213" data-attributes="member: 8993">Well im thinking about changing out the pistons in my engine since it was rebuilt with cast pistons. I am wanting to spray it so I was wanting some forged pistons, and also to raise the compression. The block has already been bored 30 over so I would just hone it and put new pistons/rings and bearings in it. Im trying to do this on a budget and this is what I have found. <a href="http://www.summitracing.com/parts/TRW-8KL2482F30/" target="_blank">http://www.summitracing.com/parts/TRW-8KL2482F30/</a> these from my calculations would give me between. 8.7:1, 64cc heads to 9.8:1, 58cc heads. I was looking to get around mid 10's to low 11's in my Compression ratio. I want to stay on pump gas only 91 oct here.Im still doing research and trying to read as much as possible. So if anyone can point me to some good readings or info, I thank you.</blockquote>