Hello I just got a 04 cobra it already had 2.8 upper pulley, idler bracket pulley, predator canned tune, cai, catted x pipe, cats back, and a BM short throw. I just started add my own mods I’m waiting on my bbk 65mm t-body, lfp heat exchanger. Once I install these mods I’m going to change the plugs and belt and get her dyno tuned. The questions are what are the best plug, gap, and belt to put on the car? Thanks