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Message: <blockquote data-quote="lwarrior1016" data-source="post: 1443291" data-attributes="member: 20210">I very highly suggest the install tool. You can rent them from auto zone fairly cheap. I had fits doing one of these on a 4.2l f150. Pull your cam sensor off the synchronizer and rotate the engine by hand until the alignment tool will go onto the old assembly. Then pull the old assembly out (while paying attention to where the arrow points and where it rotates to as it comes up, you know how a dizzy rotates as it goes in or comes out), put the install tool on the new synchronizer assembly and drop it in, watching where the arrow is and where it ends up. If you do it like this, you do not have to worry about setting TDC. Do not rotate the cam synchronizer without the alignment tool on it. You cannot adjust timing on that like a dizzy does.</blockquote>