trying to figure out wich plug to use. engine specs 355ci,scat crank.rods.forged domes .125 dart pro 1 heads 215 64cc hyd roller 560 lift 230/230 @50 1/78 super comps 735 super street quick fuel cab vac sec.about 11.5 to 1 comp i was going to start with ngk # 7 timing 34degs. any suggestions would greatly be appreciated was trying to stay pump gas with booster thanks alot