Wow, I thought maybe for clearance for the covers, Are custom headers needed ?. I see electric power steering is another upgrade. What year Nova. Thanks for bringing me up to date with the latest trend.A lot of people use the hydro boost now. I used it because the stock vacuum booster didn't clear the valve covers on the LS engine. It was relatively inexpensive but a ton of work. Getting the brake push rod to line up with the boost unit was a real challenge. I did however learn how to make up braided hoses fairly quickly. I'd always struggled with them, but bought a KOOL TOOL installation tool and that made all the difference.