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Message: <blockquote data-quote="98 GT" data-source="post: 613002" data-attributes="member: 11713">i did the head swap with the hitech stage 2's. i got new valve springs tho. if you have the money change them no point in shortcutting it. if not ive been told u dont need to change the springs unless yur turning over 6500 rpms which you probably wont be. i made 298 rwhp 315 tq with stock exhaust manifolds stock air intake with a pp upper plenum and 75mm tb. with mac catback exhaust with bassani catted x pipe. it is also my dd and i have no problems on the street with it. good luck in whichever route you choose its an awesome investment <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />i forgot to mention yes the intake valves have to be machined i sent mine to hitech and they did it for 80 bucks</blockquote>