Brad-ManQ45

Quaife makes these for the R180 and R200, abit pricey - but not as much as the NIssan parts - and they'll LAST. Nissan - R180 (240-280Z) 115mm ID ring gear $1,395.00 Nissan - R200 (280-300Z) fits both 10mm and 12mm ring gear bolts $1,395.00 http://www.quaifeamerica.com/

Accelerator pump shot is what I would look at. It sounds like you're using all of it before the engine gets going. Don't know about Performer (isn't this like a Carter?), but Holley's allowed you to change the pump cam/reposition the cam to deliver les/more and affect the timing during the stroke (where the highest volume delivered occurrs in relation to accelerator pedal travel. If I had to guess, I would think that you could slow down the initial delivery and make it last longer. Hope this helps