I'm having problems keeping the exhaust out of the inside of my 68 Convt'. No matter what I do, short of putting the top down, I can't keep the smell out. I am planning on re-sealing all of the vents, engine firewall gaskets, and ensuring I don't have any pin hole leaks in the body, which I don't believe I do. Anyone have this problem, is it something I'm overlooking, or am I on the right track.