I have tri-y's with a cable setup. If the cable is run straight into the bellhousing, there will be clearance issues. I, however, made a small bracket that goes under one of the side oil pan bolts. The bracket holds the cable inward(toward the engine) to keep it off the header. The cable then curves outward to the hole in the bellhousing. The only place where I had heat issues was where the cable first bends down at the front of the header. This was cured by wrapping that section of the cable in some hi-temp insulation. I haven't had any problems since then, that was 2 1/2 years ago and about 35,000 miles.