Hey guys, new here. i got 2005 sierra with a 5.3 with magna charger at 5.5 boost. getting ready to add some Patriot stage 2 heads what pulley should I use to bring boost back up. I think i want to get around 7# but not sure how much I am going to lose with the head install. Any help would be greatly appreciated. i think the pulley I have now is what comes stock with the kit.