ok... 2006 GTP (with 2005 GTP zzp pcm) but Now I have only this setup, modular 3.6 pulley, 180 stat, cai, 3 downpipe without cat, 2.5 catback, tr6 plug, zzp pcm... I want to install setup with XP cam no intercooler.... I wonder if I can find a file from a setup xp cam xp no intercooler and with 105# springs, single timing chaine, but I dont know what pulley size use if I install headers with this cam....