After four years of experimenting and much $$$$ the best I can do with the LT1 is 585 rwhp. Yes, I can add nitrous and hit 722 but I don't want to do that quite yet. Yet last week at the shop a stock Z06 with a set of long tube headers and a Procharger installation pulled our 579 rwhp. Sort of takes the joy right out of life!!!!! Any body with a LT1 PERSONALLY doing better than 585 rwhp I could use some help. An E mail would be appreciated.