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Message: <blockquote data-quote="Booboo" data-source="post: 1523963" data-attributes="member: 29137">I am rebuilding the 4.6 in my 97 GT.  I need advice on pistons.  The plan is to build the motor NA at first then save up for a supercharger 7 to 10 lbs of boost. Supercharger will be down the road a ways, probobly a year or so.  Right now I have the following.PI heads with +1mm Stainless valves and BTR .600 springs, 75mm TB/Plenum/CAI, 90mm MAF, BBK shorty headers, Planning on EX262AH or similar cams.  I have a iron block and CR3Z-6200-B rods. Looking for a forged piston to go with this.  Want something with valve reliefs, not real expensive but good enough to handle the hp after I get a supercharger.  What compression ratio I should run.</blockquote>