I'm having a problem with the throttle return on my 1976 280z. I'm finishing reassembly after a complete restoration of the car and I've run into an issue with my throttle return. Most other Z cars I've seen have a large throttle return spring attached to the linkage on the throttle body and to a post bolted to a bottom screw attaching the throttle body to the intake. My linkage has no hole to attach the spring to and no post attached to the bottom of the throttle body for the spring? Am I missing something? The throttle does not return well at all.