If u are getting exhaust fumes back in the car (which)I think u are this is a very dangerous situation u could be over come by the fuems very quickly and it could hurt u very badly. When u drive the fumes are being sucked up into the trunk just like if u were to have the window open.. The passing air creates a area of low pressure which creates a vaccume and sucks the fumes into the car. This is something u should fix ASAP
69 Camaro RS, 355ci, 72 gm casting heads,mild cam, Preformer rpm intake, edelbrock 600 carb, 350 turbo w/ shift kit 2500 stall, 12 bolt 4.56 posi..