Exhaust Vacume question

From what I have read,,,this type of system creates vacume at lower rpm,and not much above 4000rpm,and at best 3 to 6 .I go to 6200 rpm on a run.The expensive vacume pump systems run between 10 to 15 constant.This is a drag only car so I think I want the top sealed with the sealed breathers that have the hoses going to the exhaust check valves in the headers.Thinking I will put a small open breather on my dip stick tube.Mark