ad says new with 5 holes not 4 for $325 for all 6, i searched for info on these units both on the web and here and didn't really find anything, i don't really want to go to 370s from what i've read about smoke and heat and if i had the correct 215s in my truck i wouldn't bother but it has 160s in it from some swap and pray diagnosis by the guy i bought it from, anybody have some good or bad to say about them? do they have the same spray pattern problem as the 370s with the small bowl pistons?