[olddog]

My lines are clamped to the frame, by bolts. I believe the bolts have a drill bit on the tip and they self tap.

My lines originally ran too close to the headers. When I cut the slip fit joints off and welded plates on, the plates were about an inch closer to the clutch hydraulic line. It boiled the fluid, and I lost my clutch on the first drive. I cannot remember how close they were for sure, but it seems like 2 or 3 inches apart. I would try to keep all liquid lines as far away from the exhaust as easily possible, but no closer than 6 inches, no matter how hard it is to do.

PS
Think about holding you hand at 6 inches from a hot header. I'm not certain 6" is far enough. A foot is much better. At 6" you might want a heat shield.