The flange on the drivers side was close to the pan for me, but I have about 1/2-3/4 inch of room next to the pan rail. There's enough room for the linkage too, I have the Windsor Fox piece. The tight spot is doing to be the driver's side of the transmission cross-member. I am going to have to find a very good exhaust man to connect the collectors to the tail pipes, particularly since I'm going to want a crossover (X or H) in there as well.