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Message: <blockquote data-quote="r3dn3ck" data-source="post: 258327" data-attributes="member: 9214">with a 2v don't count on 400rwhp being possible with 2v heads. They just don't flow enough to get there. Much more than 360rwhp is just not streetable on the 2v heads. 3v heads with a big hogging out done to them maybe... 4v heads definitely.If you have a 5.4 2v, then have the heads race ported with bigger valves & hardened seats, PM me for some cam specs, bore the block .030 over, grab some H-beams and a set of flat top slugs. Make sure you use a windage tray, high volume oil pump and ARP studs all around. Use the new HPS intake (when it's out in a month or 2) and longtubes. You'll make the power you want. Don't forget that a 50 shot of giggle gas is something you can do dry and it's cheaper than upgrading to 3v heads.</blockquote>